Feeling and looking your best is always in season, and having a strong core helps with both. A woman named Nikki (Instagram handle Nikki Gets Fit), who keeps sharing insights into her 72-pound weight ...

Better posture. Weak upper abs often result in poor posture and spinal misalignment, but by targeting these muscles, you can ...

A strong core is about more than just six-pack bragging rights — it’s the foundation of your strength and overall well-being. But you don't need to torture yourself with endless crunches. Instead, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." I love working out, and a good workout challenge is even better. When I had the opportunity to try model ...