Physiologically Speaking

Greetings! Welcome to the Physiology Friday newsletter. Details about the sponsors of this newsletter and deals on products I love, including Wild Roman skincare, Ketone-IQ, Equip Foods, and ProBio Nutrition can be found at the end of the post. Physiologically Speaking is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Energy balance is central to almost everything.

Timing is an aspect of health I’ve been thinking about for a while. And it’s probably the area of my life where I’ve “experimented” the most in regard to performance, sleep, and day-to-day productivity. We spend a lot of time debating what to eat, how much to exercise, and how many hours to sleep. These are important questions. But the more I read and write about physiology, the more I find myself coming back to another one: What about when?

Greetings! Welcome to the Physiology Friday newsletter. Details about the sponsors of this newsletter and deals on products I love, including Wild Roman skincare, Ketone-IQ, Equip Foods, and ProBio Nutrition can be found at the end of the post. Physiologically Speaking is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Most weeks, I use this newsletter to take one study and pull it apart.

Greetings! Welcome to the Physiology Friday newsletter. Quick promo for a new partner of this newsletter: Wild Roman. They’re an all-natural skincare brand for men who want a simple, effective routine designed to strengthen skin with modern formulas and wild-sourced ingredients. The company was started by my friend Sahil Bloom, and it’s the only skincare brand I’ve enjoyed using. Their biggest seller is the complete face routine, and I’m partial to the bar soap (seriously… it’s incredible stuff).

Greetings! Welcome to the Physiology Friday newsletter. Details about the sponsors of this newsletter and deals on products I love, including Ketone-IQ, Create creatine, Equip Foods, and ProBio Nutrition can be found at the end of the post. Physiologically Speaking is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Exercise makes the heart a little larger and more compliant (think “stretchier”).

A few days ago, Max Lugavere posted that walking is “the most underrated form of cardio there is.” Walking is the most underrated form of cardio there is. I would never get an overweight person to run for weight loss. Each pound of excess weight puts 4 lbs of pressure on the knees and 6 lbs on the hips. When it comes to weight loss, I’d rather have them focus on diet, lifting weights, and walking 2 miles than running 2 miles.

Greetings! Welcome to the Physiology Friday newsletter. Details about the sponsors of this newsletter and deals on products I love, including Ketone-IQ, Create creatine, Equip Foods, and ProBio Nutrition can be found at the end of the post. Physiologically Speaking is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. One of the few nearly indisputable principles of exercise physiology is that you get out what you put in.

In this episode, I sit down with Arnar Larusson, founder and CEO of Tymewear, to talk about one of the most interesting and still underused metrics in endurance training: ventilation. Most athletes are accustomed to tracking heart rate, pace, power, and maybe lactate. Tymewear approaches training from a different direction by measuring breathing directly.

Greetings! Welcome to the Physiology Friday newsletter. Details about the sponsors of this newsletter and deals on products I love, including Ketone-IQ, Create creatine, Equip Foods, and ProBio Nutrition can be found at the end of the post. Physiologically Speaking is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. I’m often ravenous after finishing a long run.

Greetings! Today’s Q&A is basically four versions of the same question: What do you eat before really early runs? What about when you train in the afternoon? What do you eat during your runs? And what do you eat afterward? So, really, this is just a post about how I think about fueling before, during, and after exercise.