All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a core movement as well. It's all about positioning. One great example of this is the V-sit ...

Working through controlled positions encourages a smoother motion of your shoulder joint, which can help you lift your arms ...

Get step-by-step instructions for chair exercises for arms that build strength, improve mobility, and support everyday ...

Want to avoid the dreaded "text neck?" Don't look down — it's not good for your neck and will cause you pain. Once you bring your gaze to the horizon level, this also corrects your posture in space ...

While ripped arms look good, strong shoulders will help you move through life easier. The muscles in your shoulders are involved in every upper body movement, whether you realize it or not. Every ...

Chair arm exercises after 65 can rebuild strength safely. Get 4 easy moves with expert tips for better daily function.

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a ...