To help you work your upper body w no weights: Push-Up Variations
-Wide (hits the chest harder)
-Diamond (hits the triceps harder)
Well, you have options--
1. Do one of each in a row, until you just can't do anymore. "to fatigue"
2. Do 10 of each, 2 times through
3. Pick one, do all you can for 30 seconds. Rest. Repeat (once or twice more).
4. Do 10 at various times through the day
Shake out those arms before and after!
Do you have other favorite variations?