Hmmm...I'll have to test to failure. Haven't done that yet. I don't really "push" myself on push ups like I do training on the bike. I'm just trying to keep those muscles active and give them a little resistance a few times a week.

I do a warm up of 10 modified (from the knees). My shoulders thank me for that and feel better as I get more pushups in. Then do the following sets with a very short break in between. 10, 15, 15, 10. I do them slowly and with good form. I'm thinking if I pushed it I could get 30 in. Not great but better than the 10 I could do a few months ago. Of course, pushing less weight up helps .

Age 45 weight 186