I do a lot of aerobic exercise and I finally added some resistance training. The only thing I do is push-ups. My simple plan is three sets of about eight to failure. There's no chance I can do a real push-up yet so I do angle push-ups that is to say on stairs or even a wall. I adjust the "weight" so to speak by adjusting my angle, I choose a "weight" where I fail at about 8 or 9 reps as mentioned. I concentrate on good form and for each rep I use s "3 seconds / 1 second / 3 seconds" approach - because I read that somewhere. I do this on alternate days. I eat a good amount of protein as appropriate.
I love doing my push-ups and I hope one day I can work towards doing a real flat floor push-up.
I do a variety of that form of push-up, ie hands at slightly different widths, grips.
But I guess push-ups focus on one particular group of muscles.
Please tell me one good bodyweight exercise I can add for the arm/upper body muscles I'm missing. Thank you.