
Last week strained something in my chest doing my push-ups, this week I've hurt my right shoulder so much I can barely move my right arm and couldn't sleep well for three nights. I think it must be from the "Nitric Oxide Blow-out" routine I do which uses a lot of large arm movements. I can't walk or ride a bike because my left knee is too wonky, so the standing or sitting exercises are all I can do and they tend to use the arms a lot.
Here are a few random thoughts, hopefully helpful.
Personally I feel that pushups are okay for people in their early 20s, but unnecessary and way too hard for seniors.
Also that nitric oxide blow out fad, using quick jerky movements with no recovery between, is totally the wrong way to exercise.
Okay, so what to do. The way to build strength is with slow movements, not quick jerky ones.
You could use a couple of 3 or 5 pound handweights, lay on your back on the bed, and raise the weights slowly up and down.
For the heart etc, steady continuous exercise is best. The intensity can be gradually increased with fitness, taking care to not overdo it.
Walking is a great exercise for this. Personally I feel that walking is perhaps the best exercise, due to it's importance in keeping our mobility.
Walking around the house, walking around the yard, walking around the neighborhood.
House work is exercise, washing things, cleaning the floors, doing yard work, gardening, mowing the grass (and weeds).
Any exercise, before doing it fast and/or hard, first needs to be done slowly and easily.
Plus any time an exercise is too hard, it's too hard. New exercises are best started out both slowly and easily.