In terms of pull-ups and crunches cause I actually deal with this on a daily basis...  ::)<br/><br/>Doing more than 10 pull-ups without touching the ground is considered pretty darn amazing for a normal teenager. Those who aren't physically active can barely do one to begin with. So, if you want to shoot for "normalcy" in five minutes? I'd say 15-20 while factoring in fatigue. Of course, we got some characters who are more...physically inclined (augmented strength) or have been in training for a lot of their lives so they will likely be able to do more. In the end, just go with common sense ;) As long as it's not like...150 or something ridiculous, it should come across as believable.<br/><br/>Crunches...well, we don't really do crunches really often. So I tried out a field test myself and got 52 in a minute. Factoring in fatigue, I'd say 90-100 after five minutes would be kind of normal. Again, as long as it's a reasonable number in regards to your character, it shouldn't be any trouble!