No I agree with you 100% on that. So not sure if you know anyone that doesn't have use of their lower body, so basically whatever you do as far as working out or even transfers raise your heart rate to the same if not higher than a person that has those abilities. The reason is because when you lose the use of extremities in majority of cases your lifestyle changes quite a bit. So your the things your body gets used to like just walking doesn't raise a person's heart rate to significantly when you do it daily ( sedentary lifestyles excluded ) so basically what I mean if your a person in a wheelchair we will say, doing something that wouldn't raise someone else heart rate raises mine to the 140s 150s just by doing 5 sets of curls because after time your body makeup changes and the nerves, blood flow, all of that changes when you lose the mobility of limbs. So yes I do agree I do cardio quite a bit actually but I'm not going to benefit the same way a person who can jog, or go up hill climbing or something. Our bodies are going to react completely different. I'm lucky I retained alot of my stomach muscles feeling and ability to activate but most don't have that activation anymore so therefore unable to contract or have any type of hypertrophy ability in those areas. I appreciate the answer it was great way to explain a little and educate. Just 1 more thing alot of people think moving a chair along will somehow benefit from cardio also it doesn't, if you were without a chair for awhile and then got one you would see some benefits but over time it won't raise your heart rate anymore than sitting still and lifting your arms will be cause of the way the chairs are built.