To speed up your metabolism, your workouts must strengthen your muscles while spiking your heart rate-and of course, you need to do them regularly. These routines don't have to last long: in fact, ...

One of my favorite ways to challenge myself in fitness is to try an exercise that makes me think, "How am I supposed to do that?" It's so satisfying to find a move that's out of your comfort zone, put ...

Add Yahoo as a preferred source to see more of our stories on Google. Plyometric exercises messier squat Plyometric exercises require you to push yourself to your maximum effort through quick and ...

Planks and jumping jacks are perfectly fine workout moves. But if you combine the two together, you can actually get an even better total-body workout. Meet: the plank jack! Plank jacks involve ...

Core body strength is key for so many things; balance, posture and - a particularly popular one - building abs. The plank is probably the first move you think of when you want to do abdominal ...

Plank jacks involve keeping your body in a plank position, while jumping both legs out into a wide V, and then hopping them back together again. The move challenges both your core and shoulder ...