First of all, keep in mind that strength is one thing and endurance is another. To some extent, you need one to have the other. However, YOu can be really strong with poor endurance and you can have great endurance while being very weak.
Push-ups require a little strength and a lot of endurance. If you want to do push-ups and sit-ups (or anything, for that matter), you need to do them. A good example is pull-ups or ring-dips. There are some really strong people who cannot do many of these exercises.
If you are having difficulty doing push-ups, scale them and work yoru way up to regularl ones. For example, start going from your knees, doing as many as youc an for a minute. Rest a minute and repeat for a total of 3x. Once you can't do them from your knees, just do the negative portion, slowly lowering yoruself to the ground. The key is to keep the movement.
Once yous tart doing this routine, bump it up to normal push-ups, from your toes. Do as many of these in the routine as you can and then go to your knees.
We bring evil things to evil people, kicking in a door near you!
."In theory, there is no difference between theory and practice. But,
in practice, there is."
- Jan L.A. van de Snepscheut
"The difference between 'involvement' and 'commitment' is like
an eggs-and-ham breakfast: the chicken was 'involved' - the pig
was'committed'."
-unknown
Working on a PhD in CQB one doorway at a time.
When the wolf attacks, he will find not all who run with the flock are sheep!