I remember demonstrating a variation of stand-up sit-ups during F45 classes. The saving grace was using a bosu ball to rest my mid to upper back on, meaning there was less distance to travel each rep.

We’ve said it before and we’ll say it again — when it comes to building a rock-solid core, endless sit-ups and planks alone won’t do it. Not only does switching things up help you beat ...

No sit-ups — just this four-move standing ab workout to build a stronger core. ... all performed standing—so there’s not a single sit-up in sight—and will only take you 15 minutes.

The post, which had accumulated 6.3 million views, 6,900 likes and 1,000 reshares as of this writing, included a video demonstrating the way to sit and stand up, a clip from a 2023 segment on the ...