Physiologically Speaking

Tracing the steps towards scientific progress.

Heart rate variability (HRV), Endurance Coaching, Technology, Life, and other ramblings

Useful information 3x a week about health, fitness, nutrition, mindset, and performance.

Endurance Training & High Performance Habits

A physician /longevity author's take on midlife health, movement, and resilience. I write about fitness, longevity, mindset, and the quiet cost of stillness. Sometimes, it is orthopedic and always focused on living stronger—on purpose.

Value Investing, Life/Philosophy and Classical Music Explained

Evidence-based strength and conditioning articles. Subscribe to get the free "Strong in 60 Minutes Per Week" guide found in the welcome email!

Your weekly digest of the latest running research, training science, and gear — curated by Brady Holmer. Now with added podcast and video discussions!

Trusted by 70K+ readers, we pick the best-written books from US and UK new releases and prize shortlists, and publish articles by world-class authors on prose style and AI writing. Plus the satire The Demon Inside David Lynch.

I have been training and racing endurance events for over 25 years. Professionally, I compete in ultramarathons, coach, and host the Human Performance Outliers Podcast. On here, I write about topics and questions I have received over the years.

Your weekly guide to wellness with wisdom, the Land of Life (Israel), and sensible spirituality.

Navigating healthcare’s systemic gaps from bench to bedside

Getting stronger, faster and more capable. Without burning out.

Evidence-based neuroscience, brain health, and longevity strategies from a neurophysiologist. Protocols for sleep, performance, and aging well.

A sustainable approach to high performance.

We are passionate about living healthy lives and helping others do the same. We succinctly cover Health & Fitness topics weekly. Krista is a Doctor of Physical Therapy (DPT), and Levi is a certified personal trainer (CPT).

Practicing gastroenterologist and writer, giving readers a peek behind the curtain of the medical profession.

Number 1 Ranked Health & Wellness Substack: Newsletter covers fitness, health, and mindset, all grounded in the fundamentals of physiology.

Concise summaries of the past week's neuroscience discoveries

It's time to talk about nutrition and health with the people who you love most

Teaching health before pushing pills. Helping you become independently healthy. Making hospitals obsolete.

Linking the Why's, How's, and What's of Health and Fitness.