IMO, these things are no more than crutches. If you break a leg, you need a crutch to get around. But if you always use the crutch, you will never walk correctly again.
Long time back health can be found. Lose the big gut, if any. Can you imagine carrying a bowling ball in a pouch hooked to your belt? Second, learn some yoga and do the yoga 3x per week. Yoga, i have found, is superior to other methods of 'exercise'. Y? Always available, no need for gym, pool, track, etc. Dependency on externals won't build your mind up to be strong. Exceedingly cheap. Some lessons, yoga mat, short pants. Done. Can do yoga in tiny spaces, eg, hotel rooms, etc. Yoga can focus on whole body betterment including back, buttocks, legs, torso, upper body, spine and builds strength and flexibility. It's the best.