We asked doctors if hard workouts are messing with our stress hormone levels and what, if anything, we should do about it.

An overly stuffed pack changes how force moves through your feet, which might lead you to cancel your hiking trip or increase the risk of long-term damage. A podiatrist and one of the study's authors weigh in.

The newest Long Read on the Outside Podcast profiles rising ultrarunning star Rachel Entrekin, who is redefining what is possible in human endurance. Her secret weapon? Realistic positivity.

From desperately needing to poop to feeling burning pain in your sides, here's how to deal with all of the gross or terribly uncomfortable things that happen to your body.

An international expert panel sifts through the evidence on pre-workout routines.

Many hikers experience knee pain or burning legs on the descent. Use these expert-approved moves to build quad strength and hike pain-free.

Calf or Achilles stiffness and tension can be super painful. Here's a quick exercise that will ease aches and pain in your lower legs.

Researchers are finally beginning to study athletes who keep training at high levels while pregnant.

If you're feeling stiff, do this yoga-inspired stretching routine to get rid of knots and aches.

A gait analysis is a tool often used by runners. I got one and finally found out what was causing my hip pain on hikes.

Jeff Hambrecht founded Proverbs 27:17 Fitness with one major goal in mind: to build a community where women are absent, thus making the temptation to cheat on your wife supposedly off the table—aka a "lust-free" gym. I signed up expecting gross locker-room talk and encountering men who exclusively drove Cybertrucks. Instead, I found men (including a Super Bowl champion) crying, laughing, and trying to figure out how to be there for one another.

Improve your uphill fitness with these five variations on the training climb—from hill repeats to weighted climbs to uphill interval workouts.

From ancient Spartan hills to neighborhood walks, carrying extra weight is fitness's favorite trend. Here is what a physical therapist—and a military veteran—say about the actual benefits and overhyped claims.

Protect your knees, improve your balance, and move better on the trails with this foot workout routine.

A personal trainer says this stretch expands your range of motion, protects your knees and back, so you can hit the trails pain-free.

Research shows wearable health trackers may provide inaccurate data for people with darker skin tones. Outside spoke with major tech companies to find out how they're improving accuracy across all skin types.

Four months into motherhood and drowning in early-morning anxiety and depression, I found hope in a new study showing how therapeutic climbing forces your brain into a state of mindfulness. The lead study author and a performance psychologist weigh in.

It's not the climb that leaves your legs wrecked the next day—it's the descent. Here's how to train your quads, knees, and shins to absorb impact, control each step, and hike downhill without the soreness.

Sometimes more is less with exercise. But not always.