Kettlebells can help you gain muscle and cardio fitness at the same time. Here's what to know, according to a world-record athlete.

Tech Insider
Canadian athlete Jennifer Hintenberger performing heavy kettlebell exercise at competition.
Kettlebell exercise can help you build strength and muscle, while also improving your cardio and developing core stability at the same time.

Courtesy of Jennifer Hintenberger

Forget crunches — elite gymnasts share 2 tips for better core workouts

Tech Insider
Gymnast KJ Johnson performs a gymnastics floor routine in a purple and gold leotard
KJ Johnson, a gymnast with the NCAA Champion team at Louisiana State University, shared her go-to exercise for a stronger core.

Georgia Jones/Courtesy of KJ Johnson

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