Viral 75 Hard fitness challenge promises rapid weight loss through extreme daily rules and mental toughness, but experts warn ...

75 Hard: What happened when I tried the internet's toughest fitness challenge? - This brutal 11-week fitness challenge has taken over the internet. But critics have called it ‘ridiculous’, and ...

Rudnik is back at it with his first intense workout since having body work done, and wow he hasn’t sweat this hard in a long ...

As a former ballerina-in-training, I know breaking the rules can be tough. To this day, I have to fight the urge to win over every fitness instructor — my former ballet master's harsh critiques still ...

Stand with feet together. Shift weight to right leg. Hold a weight in each hand down by sides. Keeping back flat, core engaged, and shoulders down and back, hinge at hips by sending glutes straight ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. I first tried the ...

Everything you need to know about fitting strength workouts into your half training, so you’re strong and injury-proof come ...

Plus, exactly how to get results from whatever activity you love to do.

Bodybuilder Rebecca Vizi refuses to let her disability define her.

Exercise is known to benefit heart health. High-intensity interval training (HIIT) that combines aerobic exercise with ...

Chair exercises for hip strength: 8 minutes from a certified personal trainer to walk, climb stairs, and move easier after 60 ...