Anyway, something he did on Thursday that made me think. We were both mucking around on our computers doing "work" (Thursday is never a productive day for me) and suddenly he jumped off my bed, got down on the floor and started doing pushups!
I'm really big on trying to incorporate exercise into my every day life (taking the stairs instead of the lift etc), but my brother got me re-thinking about whether there were useful little 5 minute exercise things I could do as study breaks when I'm working. I can't really do pushups, and don't like crunches, so I tend to do things like the plank.
Do you do any of those sorts of things? What do you do?