Meet Mark

Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

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Category: Fitness

Dear Mark: IGF-1 and Fasting, Ex-CrossFitter Fitness Maintenance, and Barre Training

For today’s edition of Dear Mark, I’m answering three questions from readers. First, what’s the deal with IGF-1, growth hormone, and intermittent fasting? Some people say fasting increases growth hormones, while others say it decreases them. Who’s right? And what’s it all mean for our health? Next, how can a former CrossFitter ensure she’s maintaining her former fitness levels? And finally, what’s my take on Barre training and other “feminine” training schools?

Let’s go:

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How Using Fat for Fuel Can Boost Athletic Performance

A few weeks back, I explored the potential benefits using fat as your primary fuel can have on cognitive function. While the strongest research centers on people dealing with age-related cognitive decline and other neurodegenerative diseases, and whether burning fat and ketones can boost cognitive function in healthy adults remains unconfirmed, the totality of the evidence suggests it can provide a benefit. Today, I’ll be discussing a related topic with more solid scientific footing: the effects of fat-adaptation on athletic performance.

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Dear Mark: Did Three New Studies Debunk the Primal Blueprint?

For today’s edition of Dear Mark, I’m answering three questions that at first glance appear to cast doubt on some of the founding tenets of the Primal Blueprint. First, did a recent study show that low-carb dieting is no better—and perhaps worse—than low-fat dieting at helping you lose body fat? The second is a two-parter: are we hypocrites for “ignoring” the insulinogenic effects of protein, and does a paleo diet actually abolish the beneficial effects of CrossFit?  And third, a new study found evidence of cereal grain consumption in a group of European hunter-gatherers. What gives?

Let’s go:

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Dear Mark: Salt Room Therapy; Can’t Sleep After Training

For today’s edition of Dear Mark, I’m answering two questions. First, what’s the deal with salt room therapy? Are there actual benefits, particularly for dermatological and respiratory conditions, to sitting inside a room as aerosolized salt wafts over you? Second, what can a reader do who absolutely can’t get to sleep after training at night? Postworkout insomnia is a real drag, and it will impede your gains, so this is an important topic. Luckily, there are a few things to try.

Let’s go:

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Dear Mark: Tendon Edition

Last week, I told you how to strengthen your tendons and improve their resilience to strain and injury. You had a lot of questions in the comment section. For today’s edition of Dear Mark, I’m answering some of them. First, can Dan John’s “Easy Strength” program work for bodyweight training? Probably, and I give my suggestions on doing so. Next, what’s the deal with meniscus tears—mild ones? Can you heal them yourself? Are there any exercises that help the process? And finally, can the tendon exercises I discussed in the original post help folks with carpal tunnel syndrome?

There were some other questions about nutrition for tendon health, which I’ll cover in a future post. Don’t think I’m ignoring them.

Let’s go:

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Why Training Your Tendons Is Important (and 11 Ways to Do It)

Building muscle is simple. Lift heavy things, rest, make sure you eat enough food, sleep, repeat. For a beginner, progress is linear and relatively sudden. You get quick feedback: your muscles get more defined, you look a little leaner, you can lift a little more each session, friends and co-workers notice and comment on the changes. New striations pop up, clothes fit differently, you feel more capable dealing with the physical world. You’re hungrier and heavier, yet still manage to drop belt sizes. All is well.

Muscle isn’t the only thing you’re impacting when you lift heavy things, though. You’re also imposing stress on your tendons and demanding an adaptive response. You’re training your tendons, too.

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