If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...

“Most of us have grown up influenced by a society overly obsessed with looking healthy at the expense of being healthy,” writes Dr. Gabrielle Lyon, D.O., in “The Forever Strong™ Playbook: A Six-Week, ...