"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a ...

Don't just sit there! Try this amazing ab exercise. It's a one-minute challenge combining two classic core moves: the V-sit and the Russian twist. Trust us — you're going to love it. But if you hate ...

All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a core movement as well. It's all about positioning. One great example of this is the V-sit ...

Incorporating SIT sessions into your fitness routine can help boost your cardiovascular health and athletic ability. Emilija Manevska via Getty Images If you’ve dabbled in fitness in recent years, you ...

To chisel your abs and strengthen your core, add some dumbbells to your core workout. Adding some weight forces the fibers in ab muscles to activate more fully, making each rep more effective. This ...

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The stability ball is a great tool to incorporate in your exercises, especially when it comes to core work. Adding the stability factor causes your core to contract even more while exercising, making ...