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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Tag: dear mark

Dear Mark: Does Physical Activity Affect Obesity Risk?

For today’s edition of Dear Mark, I’m answering one question from a reader. It concerns the effects of physical activity on obesity.

This is an evergreen topic, a constant in the queries I receive. Is exercise necessary for weight loss? Does physical activity improve body weight? Is exercise all about burning calories, or is there something else going on?

Let’s get to it:

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Dear Mark: Pregnenolone

In today’s edition of Dear Mark, I’m talking about pregnenolone, the “master hormone.” Most of the hormones we talk about, like testosterone, estrogen, and cortisol, all have pregnenolone as their precursor hormone. What can happen when pregnenolone goes too low? Can taking pregnenolone solve any problems? Is menopause actually a pregnenolone deficiency?

Let’s find out….

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Dear Mark: Saunas and Finnish Longevity, Saunas and Sperm, What About Ambient Temperature?

For today’s edition of Dear Mark, I’m answering three questions from readers. There was some good feedback after last week’s sauna post, and I want to address a few of the comments. First, does the fact that Finns don’t live as long as some of the other more storied “blue zone” populations despite using saunas negate the utility of the sauna? Second, what should we make of the recent study showing negative effects of sauna on sperm health? And third, isn’t it more “natural” and Primal to seek out smaller ambient temperature fluctuations, rather than brief exposures to extreme temperatures?

Let’s go:

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Dear Mark: Is Coconut Oil Pure Poison?

It appears that we’re well into “outrageous media frenzy over terrible or misleading claims by nutrition scientists” season….

Last week I covered the “low-carb” and mortality study, and for this week’s edition of Dear Mark I’m covering the (latest) coconut oil controversy. A Harvard professor recently launched a dramatic harangue against coconut oil, calling it “pure poison.” Is it true this time? Are we indeed killing ourselves?

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Dear Mark: Choline Supplementing, Too Many Almonds, Keto and Insulin Resistance, and How to Drink

For today’s edition of Dear Mark, I’m responding to four reader comments. First up, if a person can’t eat eggs, doesn’t like liver, but really wants choline, can they just supplement? Second, are a couple handfuls of almonds too much omega-6 for the average person? What if they eat fish? Third, a new study claims to show that keto dieting tanks hepatic insulin sensitivity. What should we make of it? Are we giving ourselves type 2 diabetes by going keto? And fourth, I highlight a great approach to drinking alcohol (and living in general) from one of our readers.

Let’s go:

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Dear Mark: Following the Money, HIIT Workouts, HIIT and ACL Recovery, Spinach, Collagen Timing

For today’s edition of Dear Mark, I’m answering six questions from readers. First, is funding from a biased source sufficient to negate a study’s results? Second, what are some good high intensity interval training workouts that people might not have considered? Third, what can someone recovering from an ACL tear do for HIIT without triggering knee pain flareups? Fourth, how do I like to eat spinach? And finally, how and when do I like to take collagen?

Let’s go:

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Dear Mark: Supplement Q and A

For today’s edition of Dear Mark, I’m answering several questions from the comment section of a previous post about my training supplementation. There were some fantastic ones.

I explain my favorite dinners and the latest I’ll eat it. After that, I give a couple ways to test (or not) the effects of these supposedly beneficial foods, nutrients, and supplements we all like discussing. I also tell how often I eat oysters, liver, and seaweed. Finally, I discuss collagen dosage and supplementation for IBS and Crohn’s.

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Dear Mark: Marine Fat Sources, Not Gaining/Losing, Keto Breastfeeding

For today’s edition of Dear Mark, I’m answering three questions. First, what are some less expensive sources of marine fat high in omega-3s? Is canned salmon a good, safe, effective option? Second, a reader is training hard, eating low-carb/keto, doing IF, and feels pretty good despite not losing or gaining any weight? What should she do? What could she be doing wrong? And third, should you go keto while nursing?

Let’s go:

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Dear Mark: Japan and Meat, Circadian-Friendly Nightlights, Barefoot Hiking Tips

For today’s edition of Dear Mark, I’m answering three questions from readers. First up, what was my main takeaway from the “Japan and meat” video posted last week? Second, are there any circadian-friendly nightlights—ones that don’t negatively affect our natural secretion of melatonin or disrupt our circadian rhythm? And finally, what are my tips for barefoot hiking? How can someone get their feet acquainted with the natural ground, deal with sharp rocks and gravel, and learn to enjoy their barefoot experience in nature?

Let’s go:

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Dear Mark: Bedtime Routine, One Marker, DOMS, Primal Fantasy Lives, Basic Exercise, and Outside Eating Situations

For today’s edition of Dear Mark, I’m answering several questions from readers about my own personal routines and interests as well as a Primal take on beginning fitness. First, what’s my sleep hygiene routine? Do I even have one, and how has it changed over the years? Second, how do I make sure I’m staying on track in life? What’s the “one marker to rule them all”? Third, are there any good supplements or interventions for DOMS—delayed onset muscle soreness—due to training? Fourth, what are two places I’d love to live, and live Primally? Fifth, how should a totally inexperienced person who’s just lost a bunch of weight through eating alone get started with exercise? And sixth, how do I handle myself in eating situations where I have no direct control over the quality of ingredients (oils, etc) used?

Let’s go:

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