https://sealgrinderpt.com/navy-seal-workout/herschel-walker-pushup-workout.html/
I used to do exclusively pushups for upper-body fitness; not that I was a pushup champion, but I did around 300 per day at the age of 63. Then my aorta dissected, and I have a funny feeling the pushups had a lot to do with it. Now I’m not permitted to do pushups, or lift anything heavier than 40 pounds, and not even that if I have to “grunt” to do it.