instability training

Ever feel like your hamstrings are holding you back from reaching your lower-body potential? Instead of hitting the leg curl machine, here’s another move for you—the Stability Ball Hamstring Curl. This underrated exercise builds lower body strength and muscle while bulletproofing the hamstrings...

Jozef Polc / Getty Instability training is popular in many fitness circles, including CrossFit, HIIT, and yoga. As the name implies, it involves introducing instability to your exercise, usually with external implements. For example, you could utilize an unstable surface like a Swiss ball or...