The several months of consistent exercise I was doing a few months ago helped, I think. This time last year, I struggled to do 10. Now, I start to feel the burn when I reach 16 but I just power through.

Numbers without adjusting for age are meaningless.

When I was 18 and weighed 130 lbs, I could do 50 push-ups almost effortlessly.

These days, I struggle to do 20 (still can, but my arms will literally noodle-fail at 25).