Naturally, your go-to core workout might include a variation of sit-ups, crunches, and planks. Because as a runner, you know how important training your midsection is to improve your performance. But ...

There are so many exercises you can use a stability ball for, especially when it comes to targeting your core. Why? Because this fitness tool, otherwise known as an exercise or Swiss ball, challenges ...

A Bosu ball is a great fitness tool to challenge your balance — have you ever tried standing on one of these?! — and stability moving through an exercise. Alexia Clark, NASM-certified personal trainer ...

Add Yahoo as a preferred source to see more of our stories on Google. Unlike regular crunches, which require lifting the upper body off the ground, reverse crunches involve lifting the hips and legs ...

Nothing will humble you like an exercise ball. Working with an exercise ball can also help you improve your sense of your body in space, a.k.a. proprioception, Jeffers explains. “Stability ball ...

Core training is an important component of any well-rounded fitness program. Yet, with so many exercises to choose from, you may wonder where to start when it comes to building a strong, developed ...