Start on all fours. Extend your right arm in front of you and your left leg behind, actively reaching in opposite directions.

DIRECTIONS: Warm up with a 1-minute plank, 1 minute of reverse lunges, and 1 minute of jumping jacks, then do the exercises ...

“Strength training is every runner’s secret weapon!” says Lindsey Clayton, senior instructor at Barry’s in New York City and co-founder of the Brave Body Project. “A balanced strength-training routine ...

Start your calisthenics journey with this beginner-friendly workout designed to build strength, flexibility, and coordination ...

Resistance bands are an easy way to introduce yourself to strength training. They are versatile and start at a very low resistance, helping you build your strength. Whether you are recovering from ...

For a program to be most effective, Washington recommends sticking to it for at least four to five weeks before changing it ...

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 ...

This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. “Right to the core,” “core values,” and “hardcore.” These little idioms highlight just how vital the concept of “core” is in our lives ...