My brother and I exercise now and then. He mostly just plays on his Nintendo DS. I am naturally stick-thin. My brother, not so. He's younger than me, so maybe he'll even out later. Anyways, I do ~25 full push-ups, a few minutes break, than 35 "Knee Push-ups" (I have my knees on the floor, instead of on my toes), followed by 20 sit-ups. I miss a day or 2 now and then, and I'm not particularly strong (I'm a scholar, what can yah say?). Every 3rd day I do 10 min of Jog-In-Place, too. Not much of a "Work-Out", as much as a "Don't get chubby" thing. My High-School has a 2km/1mile square campus, so I get a work-out walking all around with my 20-25lb bookbag+books
25 Push-Ups
35 "Knee" Push-Ups
20 Sit-Ups
10 Min Jog-In-Place
High-School Campus + 20-25lb Bookbag
All in all, not too bad, I think. Opinions on improving the regimen?