It's probably not what you think. It's great for me, helps keep me in shape and my muscles toned. All I do is lift for my upper body a 10/20/30/40/50 pound hand barbell weight. I listed the different weight sizes depending on where you start. My dad after his heart attack just used a 10 pound weight for his left and right arm to get his cardiovascular blood pumping on my recommendation and it was a great way to exercise while sitting down for him. I use the 40 pound weights limited to 12 repetitions for each arm in 4 muscular areas. The biceps, shoulder, triceps and pectoral muscles. I've been doing this for years and I'm quite fit now with my upper body. It is an hour workout, giving time in between each 12 rep. workout for some rest(drink plenty of liquids). Well, this is one of the ways I use to try and stay fit, still going at over 60 years old now. No one is too weak or too old to lift weights, just choose the pound weight that is comfortable for you and work your way up when you can do it 12 times to a heavier weight and start all over again until you can do that pound weight 12 times. You get the idea. Try it, you might like it and who knows become inspired!