Add Yahoo as a preferred source to see more of our stories on Google. Physical therapist Jenny Brennecke shared a "stomach vacuum" tutorial on her TikTok account @drjennypt. (drjennypt / TikTok) ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty images The horizontal ab squat is a core exercise that strengthens your lower abs ...

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

The “stomach vacuum” may sound like a plastic surgery trend, but it's actually an abdominal exercise. And it's a popular one. The hashtag #stomachvacuum has more than 100 million views on TikTok, but ...