Ground Combat Element Integrated Task Force

Monday, September 14th, 2015

Some 400 Marines, including about 100 women, signed up to be test subjects in the Marine Corps’ Ground Combat Element Integrated Task Force experiment:

Cpl. Janee’ Sheffield knew she was done when she kept rolling the same ankle on daily hikes, leaving her in constant pain. She dropped on request from the provisional rifle platoon — made up of Marines who had not attended ITB — six days before the unit completed its round of assessments at Twentynine Palms and traveled to nearby Bridgeport for mountain warfare exercises.

Like the other rifle platoons, the provisional platoon was on a repetitive cycle that alternated between two assessment days: a movement-to-contact exercise in which Marines would charge 1,000 yards up a hill with weapons and 30-pound packs, scramble over an 8-foot shipping container and maneuver together toward simulated enemy fire while shooting at pop-up targets; and a hike day involving a roughly 4.5-mile march followed by two arduous hours digging fighting holes.

Before opting out of the task force, Sheffield, 23, had decided the infantry wasn’t for her.

“It sucked; it really sucked,” she said. “I wouldn’t do this experiment again.”


While videos and photographs released by the Marine Corps show women excelling at combat tasks, Bradshaw said they omitted the moments of failure. He watched a four-woman team struggling for more than seven minutes to move a 200-pound dummy, without success, he said. Another time, he said, female Marines failed to clamber over the top of the shipping container during movement-to-contact assessments.

One lance corporal who entered the experiment “believing that women should get a shot at service in the infantry as long as they could meet existing standards” changed his mind after he saw what happened in the light armored vehicle platoon — where the physical demands weren’t extreme:

Over time, he said, discipline broke down because some noncommissioned officers were hesitant to hurt the feelings of more junior female Marines with orders or correction. Romantic relationships and friendships between male and female unit members also became a distraction, he said.

“The female variable in this social experiment has wrought a fundamental change in the way male NCOs think, act and lead,” Augello wrote in the 13-page paper he presented to Marine leaders, which he shared with Marine Corps Times. “A change that is sadly for the worse, not the better.”

Physically, both the men and women in Augello’s platoon fared well. No one was dropped due to injury over the course of the experiment, unit members said. But the lance corporal said he became frustrated during group assessments, such as an exercise in which platoon members had to work together to haul a dummy weighing nearly 200 pounds out of the vehicle turret and to a designated recovery spot dozens of yards away. When partnered with the platoon’s female Marines, he said he frequently had to compensate for their smaller frames and lack of upper body strength by hauling more of the load.

“I told myself, ‘I don’t know how much longer my back will have after doing this,’” he recalled.

During one assessment, Augello said he found himself paired with the smallest male Marine in the platoon — one who was physically shorter and slighter than a number of the unit’s female Marines. But the Marine’s build and musculature made a significant difference, he said.

“I didn’t feel a lot of stress on my back because he was able to actually help me,” he said. “His upper body strength made the difference at the end of the day.”

The Marine Corps’ data findings included the following:

  • All-male squads and teams outperformed those that included women on 69 percent of the 134 ground combat tasks evaluated.
  • All-male teams were outperformed by mixed-gender teams on two tasks: accuracy in firing the 50-caliber machine gun in traditional rifleman units and the same skill in provisional units. Researchers did not know why gender-mixed teams did better on these skills, but said the advantage did not persist when the teams continued on to movement-under-load exercises.
  • All-male squads in every infantry job were faster than mixed-gender squads in each tactical movement evaluated. The differences between the teams were most pronounced in crew-served weapons teams. Those teams had to carry weapons and ammunition in addition to their individual combat loads.
  • Male-only rifleman squads were more accurate than gender-integrated counterparts on each individual weapons system, including the M4 carbine, the M27 infantry automatic rifle and the M203 grenade launcher.
  • Male Marines with no formal infantry training outperformed infantry-trained women on each weapons system, at levels ranging from 11 to 16 percentage points.

Female Marines often struggled with routine tasks:

In scaling an 8-foot wall obstacle, researchers wrote, male Marines would throw their packs to the top of the wall, while female Marines “required regular assistance” to do the same. During simulated casualty evacuations involving a 200-pound dummy, mixed-gender groups were notably slower at the task, except in cases when a single Marine would move the dummy using a fireman’s carry. And in those cases, “it was most often a male Marine who ‘evacuated’ the casualty,” according to the findings analysis.

Some of the biological data surprised me:

  • The average male Marine volunteer was 178 pounds with 20 percent body fat; the average female volunteer weighed 142 pounds with 24 percent body fat.
  • In anaerobic power and capacity, female Marines averaged 15 percent lower levels than their male counterparts. In anaerobic power performance, the top 25 percent of female performers and the bottom 25 percent of male performers overlapped.
  • In aerobic capacity, female Marines demonstrated levels 10 percent lower on average than male Marines.
  • Over the course of the assessment, musculoskeletal injury rates totaled 40.5 percent for women, more than double the 18.8 percent rate for men.
  • In all, female Marines sustained 21 “time-loss” injuries which took them away from task force duties for a day or more. Nineteen of the women’s injuries were lower extremity injuries and 16 percent took place during a task that required movement while carrying a load. Officials said they could not immediately provide the comparable injury rates for men but said lower extremity injuries were the most common among male Marines as well.

I wouldn’t expect young male Marines to carry 20 percent body-fat.

The real problem is injury rates:

High injury rates among women were also a problem at the Infantry Training Battalion, the Marines’ basic infantry training school for enlisted troops that temporarily opened to women between 2013 and 2015. Researchers found that female ITB participants were injured at more than six times the rate of male participants, and nearly one-third of their injuries occurred during movement-under-load tasks, while just 13 percent of male injuries did.

Overall, women graduated ITB with a 36 percent success rate during the evaluation period. Male Marines had a 99 percent graduation rate during that same window.

Dear Fat People

Monday, September 7th, 2015

I had never heard of comedienne Nicole Arbour before, but it caught my attention when YouTube shut down her page because her “Dear Fat People” rant offended the Powers That Be.

Not terribly clever — but it doesn’t have to be.

How Serena Williams Produced Her Second Act

Tuesday, September 1st, 2015

There’s no better word to sum up Serena Williams in 2015, Tom Perrotta suggests than — wait for it — wisdom:

At age 33, Williams has improbably peaked when injuries and indifference usually spell the end for a tennis champion. She remains an otherworldly athlete, blessed with speed, flexibility and strength that equals or surpasses her competitors. It’s not a trivial advantage.

But Williams’s speed and power have long obscured other, quieter attributes. She is a tennis player’s tennis player, and these days she relies more than ever on her mind, her determination, her tactics, her anticipation and a serve that is a study in perfect mechanics.

“I’m a really amazing thinker on the court,” Williams said.

To illustrate her wisdom, the Wall Street Journal chose this image:

Serena Williams Serving at 124 MPH

10-20-30 Training

Sunday, August 16th, 2015

Interval training has its strengths and weaknesses:

Many studies have shown that even a few minutes of these intervals can substantially improve health and cardiovascular fitness.

But high-intensity interval workouts have a drawback that is seldom acknowledged. Many people don’t like them and soon abandon the program.

Jens Bangsbo, a professor of physiology at the University of Copenhagen in Denmark, and his team came up with a candidate routine and named it 10-20-30 training:

Run, ride or perhaps row on a rowing machine gently for 30 seconds, accelerate to a moderate pace for 20 seconds, then sprint as hard as you can for 10 seconds. (It should be called 30-20-10 training, obviously, but that is not as catchy.)

It worked:

After eight weeks, almost all of the runners in the 10-20-30 group were still following the program. And when they repeated their 5K runs, they had shaved an average of 38 seconds from their times. Most also had lower blood pressure and other markers of improved health.

There were no changes among the runners in the control group.

(Hat tip to Mangan.)

Don’t be a victim of muscle loss

Sunday, August 2nd, 2015

The average muscle loss in men between the ages of 50 and 70 is 30 percent, Mangan notes, and from ages 70 to 80, another 20 to 30% of muscle is lost:

Add those figures and you’ve got the basis for the fact that most 80-year-old men will have lost 50% of their muscle mass.

It doesn’t have to be that way, if you keep active:

Muscle-Loss Cross-Sections

Blowing up a Balloon

Saturday, August 1st, 2015

Nutrition gets little attention or respect in medicine, but Dr. Malcolm Kendrick became side tracked by the very powerful and consistent association between heart disease and diabetes:

In short, if you added together what was clear about diabetes and insulin resistance, you got a model of type II diabetes which looked pretty much like this:

  • You eat too much food.
  • You put on weight.
  • As you put on weight you become more and more insulin resistant.
  • At first you will develop insulin resistance syndrome.
  • If you keep putting on weight you will become so insulin resistant that you will develop frank type II diabetes.

I call this the ‘blowing up a balloon’ theory of diabetes. As a balloon expands you have to blow harder and harder to overcome the resistance. As you get fatter and fatter you need more and more insulin to force fats into fat cells. As with many things in medicine this is a nice simple story. It is also very easy to understand, and it is tantalisingly close to being correct.


Beginning with the most obese group people on the planet earth, namely Sumo wrestlers. I wanted to know how many of them have diabetes, and it did not take long to discover that, whilst in training, none of them have diabetes.

I then searched for the opposite end of the spectrum. Were there people with no adipose tissue, and how many of them had diabetes? Surprisingly, there is one such group, the least obese people on earth. They are those with Beradinelli-Siep lipodystrophy. This is a genetic abnormality which means that these poor unfortunates have almost no fat cells. How many of them have type II diabetes? Well, all of them actually.

I then looked for the population with the highest rate of diabetes in the world. This happens to be the Pima Indians of North Mexico/Southern US. I have seen figures reporting that over 80% of adult males Pima Indians have type II diabetes. It may even be more. And yes, they are very obese.

However, there are two other very interesting facts about the Pima Indians. First, they have a very low rate of heart disease. Or they did last time I looked. Perhaps most importantly, in their youth, when they are not obese, they produce far more insulin in response to food than ‘normal’ populations. Or, to put this another way, they are hyper-insulinaemic before they are obese, and long before they become diabetic. So their excess insulin production is not a result of becoming fatter. The causal chain is the other way around.

I have found that if you speak to most doctors about these facts, a look of complete incomprehension passes over their faces. ‘That cannot be right.’ Of course if you believe in the ‘blowing up a balloon’ model of diabetes, then the Pima Indians, Sumo Wrestlers and those with Beradinalli-Siep lipodystrophy do not make any sense. However, in science, when observations do not fit your hypothesis, it is the hypothesis that needs to change, not the facts.

Just to summarize these ‘paradoxical’ facts:

  • You do not need any fat cells to develop diabetes/if you have no fat cells there is a 100% probability that you will be diabetic.
  • You can be very , very, obese and not have diabetes.
  • You can have increased insulin production long before you become obese (and/or insulin resistant). You become obese later.


However, luckily, there is another model that fits all the facts. One that I prepared earlier:

  • You produce too much insulin.
  • This forces your body to store fat.
  • You become obese.
  • At a certain point insulin resistance develops to block further weight gain.
  • This resistance becomes more and more severe until…
  • You become diabetic.

This model explains the Pima Indians. Can Sumo wrestlers be fitted into this model? Yes, with a couple of addendums. Sumo Wrestlers eat to become fat, because added mass provides a competitive advantage if you are trying to shove someone else out of a small ring, before they do it to you.

To achieve super-obesity, they wake up, train for two hours, then eat as much as they can of a high carbohydrate, low fat, broth. They then lie about for a few hours allowing the high insulin levels created by the high carbohydrate diet to convert excess sugars to fat, storing this in adipose tissue. Later on they train very hard again, then eat, then sleep. Rpt.

The reason why they do not become diabetic is on this regime is simply because they exercise very, very, hard. They burn up all the sugar/glycogen stores in the liver and muscle whilst exercising, which means that when they eat, the sugar(s) can – at least at first – be easily stored in muscle and liver (so there is no insulin resistance to overcome). However, once these guys stop training, things do not look so good. Diabetes lurks..

Those with Beradinelli-Siep lipodystrophy have the reverse problem to Sumo Wrestlers. Because they have no fat cells there is nowhere to store excess energy to go. If they eat carbohydrate/sugar, the first 1,500 calories can be stored as glycogen – after that there is nowhere left. If the liver converts sugar to fat, there is nowhere for that to go either. So, you get ‘back-pressure’ through the system. It doesn’t matter how high the insulin level gets, if you have nowhere to store energy you have nowhere to store energy. End of.

Whilst those with lipodystrophy cannot tell us much about diabetes and obesity in ‘normal’ people. This condition does make it very clear that diabetes – insulin resistance, high insulin and high sugar levels – is primarily an issue with energy storage and how the body goes about this storage, and the role that insulin plays. If there is somewhere for excess energy to go easily, insulin levels will not go up, and nor will blood sugar levels.

But what of ‘normal’ people. Can normal people be fitted into the updated model of type II diabetes? Well, of course, they can. But you need another step in the new model, the first step. Which means we have a new causal chain, and it looks something like this ‘You eat too much carbohydrate.’ Adding in this step gives us the new model:

  • You eat too much carbohydrate/sugar.
  • You produce too much insulin.
  • This forces your body to store fat.
  • You become obese.
  • At a certain point insulin resistance develops to block further weight gain.
  • This resistance becomes more and more severe until…
  • You become diabetic.

(Hat tip to Mangan.)

Is The Fish Kick the Fastest Swim Stroke Yet?

Tuesday, July 21st, 2015

The fish kick may be the fastest swimming stroke yet:

Until recently, competitive swimming has focused almost entirely on what happens at the surface of the water. In early 19th-century England—which many consider to be the birthplace of the modern sport—swimmers raced using the breaststroke. A few decades later, Europeans learned a faster stroke when two Native Americans visiting London demonstrated a way of swimming they had learned growing up: the front crawl. One observer wrote, “they lash the water violently with their arms, like the sails of a windmill, and beat downwards with their feet, blowing with force, and forming grotesque antics.” The Brits eventually got over their shock. The backstroke came next, followed in the early 20th century by the butterfly stroke, which overcame the drag of the underwater recovery required by the breaststroke. The butterfly became the second fastest stroke after the front crawl.

All swimming at the surface shares the same speed restriction. “You’re always limited by your hull speed,” says Ryan Atkison, a sport biomechanist at the Canadian Sport Institute Ontario. It’s a nautical principle that also applies to swimmers. The theory goes that a swimmer on the surface cannot go faster than the bow wave that he or she creates. The bow wave increases with swim speed until, in theory, it stretches along the whole length of the swimmer’s body. Atkison says that the maximum speed is one body-length per second, which is about 1.9 to 2.6 meters per second for a swimmer about 2 meters (6 feet, 5 inches) tall.

“You can’t go any faster than that unless you climb up over top of that wave,” says Atkison. “Some animals can, like dolphins can porpoise and jump over top of that bow wave, but humans can’t physically climb out of that trough,” he says. “The only real way to get faster is to be better under water, where we don’t really have those upper limits on speed.”

Coaches began to take advantage of this fact in the 1980s, when Harvard University coach Joe Bernal realized that some of his swimmers were faster if they stayed underwater and dolphin kicked. This is essentially identical to the fish kick, except that the swimmer is flat on his stomach, rather than turned on his side. Some especially strong underwater swimmers stayed submerged almost the entire length of the pool, since there was no rule against it. That all changed in 1998, when FINA, the world governing body of competitive swimming, ruled that swimmers performing the backstroke had to surface after 15 meters.

Hyman came of age as a world-class swimmer during the underwater revolution. “I was 13 when I started staying under water longer than is typical,” she says, explaining she could go 30 meters without breathing. “I found I could be faster under water than at the surface.” Most swimmers were using the dolphin kick to propel themselves underwater, but Hyman’s coach, Bob Gillet, wanted to experiment. In 1995 he came across a study in Scientific American about how tuna were able to swim at almost 50 mph, where dolphins top out around 25 mph. The study found that the flick of a fish tail generated more efficient thrust than that of a marine mammal tail. Gillet wondered whether the dolphin kick might be more powerful on its side, so the undulations were horizontal, like those of a fish.

One cool December day in Phoenix in 1995, Gillet put it to the test. Hyman showed up for practice at Gillet’s outdoor pool, and he asked her to try it. “In the most respectful way, I called him a mad scientist,” she says. Her first attempts were awkward, and she ended up three lanes over from where she started. But she got better, and soon she was cutting through the water like an eel. She was going faster than she did with the dolphin kick. Faster than she had ever swum before. This gave Gillet another idea.

They went to the local country club pool, where the lighting was brighter and Gillet could walk out to the edge of a diving board to capture video. They took a long, thin rubber tube, fastened it to Hyman’s wrist, ran it down the length of one side of her body, and fastened the other end to her ankle. Then they filled the tube with store-bought food dye, and Hyman corked the tube with her thumb. She jumped into the pool, released her thumb, and took off as Gillet filmed. What they saw in the footage afterward astonished them. The dye swirled out to reveal huge vortices after each of her horizontal kicks. Gillet suspected that these miniature whirlpools, reaching 4 feet in diameter, propelled her forward. He also thought it was possible that when Hyman did the dolphin kick facedown, the bottom of the pool and the surface of the water interfered with these vortices and slowed her down.

Naval Special Warfare Center Physical Training Guidelines

Monday, July 13th, 2015

The Naval Special Warfare Center presents its Physical Training Guidelines, based on these key points:

  • Keep it simple
  • Use proper technique (get coaching from qualified sources if necessary)
  • Develop the whole body, especially the parts known to be vulnerable to injury

So, what are those parts known to be vulnerable to injury?

Rotator cuff, mid/lower traps, rhomboids, posterior & medial glutes, hamstrings, tibialis anterior, torso rotators

You might consider doing more than just reading the whole thing.

Treadmills Unplugged

Sunday, July 12th, 2015

The latest gym-machine craze is the manual treadmill:

The treadmills, made by Woodway, based in Waukesha, Wis., have a slightly concave tread surface, like the bottom of a hamster wheel. The front and back of the tread are higher than the middle, a design that uses gravity to help accelerate and brake. The belt speeds up when users move toward the front and slows down when they move back.


Quieter than treadmills with motors, they are especially useful in Manhattan clubs situated above other tenants, says Ed Trainor, TSI’s vice president for fitness, services and product development.


Nonmotorized treadmills are generally smaller than traditional ones and don’t require power strips or outlets. Their digital displays are battery-powered.


The belts speed up and slow down with the runner, making them useful for short-burst workouts. Though the treadmills take some getting used to, some people say they feel safer. “You’re not going to get shot off the back of it,” Ms. Fairchild says. “If you stop, it stops.”

Accidents on treadmills cause about 24,000 injuries annually. In May, Silicon Valley entrepreneur Dave Goldberg, the husband of Facebook chief operating officer Sheryl Sandberg, died after falling off a treadmill and hitting his head.


These rugged manual treadmills cost about $6,000, as much as or more than motorized ones.

Weightlifting is Anti-Aging

Wednesday, May 27th, 2015

The iron pill is good for what ails you, Mangan reminds us:

For example, weightlifting enhances brain function, reverses sarcopenia, and lowers the death rate in cancer survivors. Take this last item, lowering death rate in cancer survivors: garden-variety aerobic exercise had no effect on survival, while resistance training lowered death rates by one third; so at least in this one example, you can see that weight training is a vastly superior form of exercise.

Weightlifting also appears to be superior when it comes to fighting the aging process. Resistance exercise lowers levels of myostatin, which is one of the main ways in which muscle strength and mass are increased, since myostatin negatively regulates muscle strength and mass. Myostatin levels increase with age, which may partially account for loss of muscle mass and frank sarcopenia with aging. Mice that have been genetically engineered to have lower levels of myostatin live about 15% longer than wild-type mice.

Therefore it follows, assuming that the physiology of mice and humans are directly comparable in this regard, that lowering myostatin levels through weightlifting should increase lifespan. (And, as previously noted, branched chain amino acids, creatine, and polyphenols from chocolate and tea also lower myostatin.)

The Right Dose of Exercise for a Longer Life

Saturday, April 18th, 2015

The right dose of exercise for a longer life is about an hour of walking per day:

They found that, unsurprisingly, the people who did not exercise at all were at the highest risk of early death.

But those who exercised a little, not meeting the recommendations but doing something, lowered their risk of premature death by 20 percent.

Those who met the guidelines precisely, completing 150 minutes per week of moderate exercise, enjoyed greater longevity benefits and 31 percent less risk of dying during the 14-year period compared with those who never exercised.

The sweet spot for exercise benefits, however, came among those who tripled the recommended level of exercise, working out moderately, mostly by walking, for 450 minutes per week, or a little more than an hour per day. Those people were 39 percent less likely to die prematurely than people who never exercised.

At that point, the benefits plateaued, the researchers found, but they never significantly declined.

Train Your Breathing Muscles

Friday, March 20th, 2015

By the time they reached Base Camp, at just over 16,000 feet, the members of a British military expedition found that their arterial oxygen saturation was 20 percent lower than it had been at sea level — except for the members who had been assigned inspiratory muscle training for four weeks leading up to the expedition:

When the IMT group got to Base Camp, they had desaturated by only 14 percent, a significant six-percent advantage over the control group that persisted as they kept climbing to the advanced base camp at over 18,000 feet.


Humans have between seven and 11 pounds of respiratory muscle, primarily the diaphragm and intercostal muscles around the ribcage, which consumes energy and fatigues just like the hamstrings or biceps. The idea of training this muscle—and particularly the muscles required for inhaling—originated with patients suffering from breathing-related conditions like chronic obstructive pulmonary disease.

The basic IMT protocol those patients followed hasn’t changed: you take a deep breath through a tube with variable resistance that makes it harder to inhale. Repeat 30 times a day, ramping up the resistance as your muscles get stronger.

For over a decade, researchers have been studying whether IMT can boost endurance performance at sea level. The evidence remains mixed, but a meta-analysis of 21 studies in 2013 concluded that it probably offers a small boost, particularly in breathing-constrained sports like swimming. At altitude, though, the situation is different: breathing takes a significantly higher proportion of your overall energy, consuming 20 to 30 percent more oxygen by 9,000 feet, so the breathing muscles fatigue more quickly.

The idea that IMT might be useful at altitude was first tested in a 2007 Kansas State study that found improvements in exercise at a simulated elevation of around 10,000 feet. After four weeks of IMT, blood oxygen levels during exercise were higher, and the strengthened respiratory muscles were able to handle the demands of breathing in thin air more easily, reducing their total oxygen usage. Ratings of effort and breathing discomfort were also reduced. Curiously, actual performance in a time-to-exhaustion trial was unchanged. Read: the subjects didn’t have better endurance, they just felt better.

More recently, Lomax, the author of the Makalu study, has followed up with a lab study of her own, also at a simulated altitude of around 10,000 feet. While the results haven’t been published yet, she found that four weeks of IMT produced higher arterial oxygen levels, reduced overall oxygen demand, increased breathing efficiency, and reduced breathing discomfort during exercise. As in the Kansas State study, the benefits were apparent only during exercise at altitude, not at sea level.

The training tool of choice is an incentive spirometer, like the PowerBreathe.

Aromatase Inhibitors

Saturday, March 14th, 2015

P.D. Mangan smashed his own chronic fatigue — through diet, exercise, sleep, vitamins and minerals — and expanded his view on health and fitness. When he looked into testosterone replacement therapy (TRT), his (carefully selected) doctor recommended an aromatase inhibitor instead:

Aromatase inhibitors work to boost T by decreasing the production of estrogens, especially estradiol, the most potent estrogen. Since estradiol feeds back on natural T production, inhibiting it, lowering estradiol levels results in an increase in T. My estradiol level at the last reading had been 70, higher than the upper limit of normal for men. Why that was I don’t know, but estradiol levels increase with age in men, so maybe that was all there was to it.

So my doctor prescribed me anastrozole, the most commonly used aromatase inhibitor. Anastrozole, also known by the trade name of Arimidex, is generic and cheap: I pay about twelve dollars for a three month supply. The dosage is one-half milligram twice a week, which is quite low. Estradiol is necessary even in men, with things like bone composition depending on it, so you don’t want to drive it too low or abolish it altogether.

I noticed a difference shortly after starting to take it. For one thing, my exercise recovery appears a lot better. I used to need a solid three days off between weight sessions in order to recover fully; now I need only two. I haven’t gained any weight, but I’d say my body composition is better: a bit leaner, a bit more muscle. (I can’t seem to gain weight to save my life at this point.) And, yes, my sex drive increased noticeably.

Last time my T level was measured, it had increased to 700, a modest increase of about 20%. In some studies, using higher doses of anastrozole and in low T men, T levels have increased as much as 50%, and free T levels even more. Probably my modest but noticeable results came about because I use a low dose and wasn’t low T to begin with.

However, my estradiol level decreased to 40, well within the normal range of a young man. This may also account for what I consider a successful result of the treatment.

Running Hard

Wednesday, February 11th, 2015

Hard-core endurance training is as deadly as sitting on the couch:

Researchers looked at 5,048 healthy participants in the Copenhagen City Heart Study and questioned them about their activity.

They identified and tracked 1,098 healthy joggers and 413 healthy but sedentary non-joggers for 12 years.

Jogging from 1 to 2.4 hours per week was associated with the lowest mortality and the optimal frequency of jogging was no more than three times per week.

Overall, significantly lower mortality rates were found in those with a slow or moderate jogging pace, while the fast-paced joggers had almost the same mortality risk as the sedentary non-joggers.

Researchers registered 28 deaths among joggers and 128 among sedentary non-joggers. In general, the joggers were younger, had lower blood pressure and body mass index, and had a lower prevalence of smoking and diabetes.

Maureen Talbot, Senior Cardiac Nurse at the British Heart Foundation, said: “This study shows that you don’t have to run marathons to keep your heart healthy.

“Light and moderate jogging was found to be more beneficial than being inactive or undertaking strenuous jogging, possibly adding years to your life.

Schwarzenegger on Psychological Warfare

Friday, February 6th, 2015

Tim Ferriss interviews Arnold Schwarzenegger on psychological warfare and more:

  • The Art of Psychological Warfare, and How Arnold Uses It to Win
  • How Twins Became His Most Lucrative Movie (?!?)
  • Mailing Cow Balls to Politicians
  • How Arnold Made Millions — Fresh Off The Boat — BEFORE His Acting Career Took Off
  • How Arnold Used Meditation For One Year To Reset His Brain
  • And Much More…