Medicine balls come in a variety of sizes and weights — the smaller ones are generally lighter, while the larger ones are ...

The Russian twist is a great underrated ab workout for people of all fitness levels or ages and can be scaled harder or easier with a heavier or lighter medicine ball. Even with no weight at all ...

So grab your medicine ball, and let's get going ... All right, so out with the right leg, ball stretches out, twist to the right side. Switch sides. You'll notice you're going to get a good ...