dr. john rubinow. hey, john. >> hi, kelly. thanks for having me. >> now, john, you're a physician. >> yes. >> you're trained in orthopedics. >> right. >> you work with pro athletes. so you certainly know how important it is to stay healthy, fit, and strong. >> absolutely, kelly. i am all about people leading healthier, more active lives, no matter what their age. now, if you exercise regularly you're gonna look better, you're gonna feel better, you're gonna sleep better, you're gonna have more energy. and that's why i love the chair gym, because it makes exercising available to everyone, anytime. >> and this chair gym is so incredibly simple to use. you just sit down in the comfy chair, and then here you go. you can start shaping up. it's that easy. it's like having an entire gym all in one lightweight, compact, portable chair. >> but instead of using heavy weights, chair gym provides progressive resistance with a smooth, fluid motion. now, it's low-impact, which is great, and it works with your body's natural range of motion.