Jumping Jacks Are a Dynamic Warmup You’ll Actually Do A dynamic warmup, where you get your joints and heart moving instead of just stretching, will make your workouts better.

Greysteel, a gym outside Detroit, teaches barbell lifting for older people. Some are well into their 80s and 90s.

Jumping Jacks Are a Dynamic Warmup You’ll Actually Do A dynamic warmup, where you get your joints and heart moving instead of just stretching, will make your workouts better.

Jumping Jacks Aren't Just for Gym Class. Here's Why You Should Add Them to Your Workouts. Greg Presto Updated September 21, 2022, 4:19 PM ...