Fitness
Is lifting heavy dangerous? 150 years of lifting myths
Lifting weights has been blamed for stiffness, stunted growth and pregnancy risks for 150 years. See where each myth came from and what the evidence shows.
Joint pain: why your MRI results shouldn't scare you
An orthopedic surgeon explains why MRI tears are normal with age, and when surgery is actually worth it.
5 longevity myths worth dropping, according to research
Weight, supplements, fasting, wine and genetics: what the evidence really says about the five most common longevity myths.
Strength training: the real key to aging well, not size
An exercise scientist explains why strength and power, not muscle size, are what protect mobility with age, and how to train for both effectively.
Should you exercise outdoors during wildfire smoke?
Two physicians break down the real air quality tipping point for exercise, and why lifting indoors is safer than cardio when wildfire smoke rolls in.
The 36-hour fasting protocol built to protect muscle
A doctor breaks down a 32 to 36 hour fasting protocol that mimics a week-long fast while protecting muscle, tracked through ketones, not the clock.
Training to dunk a basketball at 49 tests real aging
A 49 year old trains to dunk a basketball, turning tendon strength, VO2 max, and vertical jump into a real world test of healthy aging.
Nine fitness tests you can run on yourself, with numbers
Dr. Andy Galpin breaks fitness into nine measurable adaptations, with home tests and target numbers for each one.
Can you build muscle in a calorie deficit? The data
Dr. Eric Helms explains when body fat, not calories, decides whether you gain muscle in a deficit, at maintenance, or in a surplus.
What six back surgeries taught Mark Hyman about health
Mark Hyman on his mercury poisoning, chronic fatigue, and six back surgeries, why he rejects metformin, and why foundations beat every biohack he has tried.
Why more muscle alone will not fix metabolic health
Muscle is where glucose goes and where insulin resistance shows up first, but one leg studies and a large review show that gaining muscle mass is not the fix.
What a geriatrician says actually protects healthy aging
A geriatrician explains why power training, smart bone medication choices, and fall prevention matter more than trendy longevity supplements.
Contemplative aerobics: train your mind while you exercise
Neuroscientist Richard Davidson on pairing meditation with exercise, the four pillars of well-being, and why 5 minutes a day for 28 days changes your biology.
The real reason skin aging starts inside your cells
Skin aging isn't just about creams. Blood sugar, autophagy, and the muscle you build shape how your skin ages.
Longevity myths a doctor really wants you to unlearn
A longevity physician explains why obsessing over VO2 max or grip strength distracts from what actually matters: muscle.