A certified personal trainer shares 5 standing exercises that build a 6-pack after 60, no crunches required.

Denise Austin just shared a core exercise on Instagram. The 67-year-old demonstrated a “great exercise that you can do standing up” to “tone and tighten” the abs. The standing crunch variation is ...

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 boredom, but it ...