Jim Dreeben, 83, took up CrossFit in his 80s and got hooked. He does 100 push-ups and also planks six days a week, and his doctor told him to keep going. Dreeben's active lifestyle includes kayaking, ...

Push-ups are a convenient exercise that you can do anywhere. They don’t need equipment or a gym membership. You can also adjust them to meet your own physical ability or to target specific muscles. If ...

Jim Dreeben has always been active, but it wasn't until he was in his 80s that he took up CrossFit. Dreeben, a retiree in Riverhead, New York, now does weekly CrossFit sessions and 100 push-ups six ...