It is because of willpower that you are able to do 20 push-ups every day. If you did not have willpower, you probably would not be able to do 20 push-ups every day. If you build more willpower within yourself, I think you will be able to do more push-ups.

I woke up early in the morning and got ready to do push-ups and completed a total of 100 push-ups in 3 sets. However, I was a little late in submitting the report early in the morning.