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...

Tell Me More
Stay Connected

Category: Weight Loss

The Myth of Perfect Conditions: 9 Common Excuses Used to Delay Exercise

It’s the Goldilocks Syndrome…. It’s too hot to exercise. It’s too cold. It’s too early. It’s too late. I’m too tired or busy or overweight or overwhelmed. When x, y, or z changes, things will be better, easier. That’s not long to wait, right? And, so, we talk ourselves into waiting and out of working toward fitness. All the while, we’re fully convinced we have the world’s most pragmatic mindset. What else could we do in such a situation? It’s just the way it has to be. Exercise just can’t happen under these circumstances. And so we give away our chance at vitality because we’re married to a set of conditions, which become – like it or not – our excuses.

Read More

Dear Mark: Sugar for Stress Relief, and Weight Loss Releasing Toxins

For today’s edition of Dear Mark, I’m answering two questions. First, a new study out is one of the first (and maybe only) to show that acute sugar consumption can reduce the normal cortisol increase we experience in times of stress. Interesting stuff, eh? Find out whether I think this is a good thing, a potentially useful “hack”, or, given our collective tendency to overthink things and embroil ourselves in stress stews, a recipe for disaster. Next, we’ve all heard that weight loss releases stored toxins and environmental pollutants into our bodies, but is there any science that actually shows this is happening in people losing weight? And if we are releasing toxins by losing body fat, does that mean keeping the weight on is actually healthier? Find out down below.

Let’s go:

Read More

How We’re Setting Our Kids Up to Be Fat, Sick, and Unhappy

I’ve been on a bit of a “children’s health and wellness” kick lately, with a couple posts discussing the importance — and, unfortunately, dearth — of free play and exploration in our children’s lives. Some of you have speculated via email that Carrie and I have something to announce, but that’s definitely not the case. This is simply an important topic for everyone with a stake in the future of this world. The mental, physical, and spiritual health of our children today will determine our trajectory through history in the decades to come. If a fat, sick, and unhappy generation takes the reins of this planet, nothing good will come of it.

Read More

Do Low-Carb Diets Cause Insulin Resistance?

A few weeks back in the “How to Improve Your Insulin Sensitivity” post, I apparently dropped a bit of a bombshell: that very low carb diets can induce insulin resistance. Many of you wrote to me asking about the effects of low-carb dieting on insulin sensitivity and wondering whether you should begin eating more carbohydrates to counter it. Well, maybe, but there’s a right way and a wrong way to eat carbs if you’re low carb. The wrong way is to just add a ton of carbohydrates on top of your low-carb Primal eating plan without changing anything else. Doing that, especially in perpetuity, will likely lead to weight gain, hyperinsulinemia, and even more insulin resistance. Bad all around.

Now, many people are perfectly happy on a perpetually low-carb diet. I function quite well on a low (but not very low) glucose diet, hovering around 100-150 grams a day and often dipping below that. I might go even lower if I didn’t love vegetables and berries so much. But, assuming you are experiencing physiological insulin resistance caused by a very low carb or ketogenic diet, what happens when you do want to incorporate carbohydrates in your diet?

Read More

Dear Mark: Osteoporosis, Body Fat Gain on Caloric Deficit, and Stalling on Primal

For today’s edition of Dear Mark, we’ve got a three-parter. First, I try to help out Karson, a guy who’s trying to convince his osteoporotic, sun-starved mother to try a few lifestyle interventions that may improve her condition without coming off as smug. Hopefully I’m persuasive enough. Next, is it really possible to gain body fat on a caloric deficit, or is something else going on? And finally, Dawn seems to be doing everything right, but she’s not losing any more weight — weight that she feels should be coming off. What can she try next?

Let’s go:

Read More

Dear Mark: Fish Oil Study, 1500 Calories, Breaking a Plateau, and Bulletproof Coffee vs IF

For today’s edition of Dear Mark, I’m answering four questions. First up is from Milad, who wonders about the recent research seeming to show that fish has little to no effect on heart disease. Is it right? Are we wasting money and enduring fish burps for nothing? Next, how low is too low? If a person’s eating 1500 calories and feeling completely satisfied, should he preemptively increase calories before bad things start happening? After that, I give a couple tips for breaking through a weight loss plateau. And last, how does Bulletproof coffee “fasting” compare with actual intermittent fasting? Is it a better alternative?

Let’s go:

Read More

Join Over 300,000 Subscribers!

Signup and get:

Primal Blueprint Fitness plus 7 other eBooks
7-Day Course on Primal Fundamentals
Special Offers and More!