So I was glad to see an exercise expert saying that actually intensive exercise and gym workouts aren't as essential as people make out, and ordinary everyday levels of physical activity are quite enough to keep us fit.
Daniel Lieberman, a Harvard professor, lists ten myths about workouts that need to be demolished. He says deliberate intensive exercise is a very modern activity our ancestors never bothered with. They only exercised when it was necessary or rewarding. "No one in the stone age ever went for a five-mile jog to stave off decrepitude, or lifted weights whose sole purpose was to be lifted."
He says it's not true that our remote ancestors were super-strong and super-fast and we need gym workouts to bring us to the same level of fitness. They were fit enough for a few hours hunting and gathering a day but that was it. They sat around just as much as we do. He says sitting is fine as long as you alternate it with other activities.
Well, that makes me feel a lot better about my fairly minimal activity level - doing the household chores, doing a bit of gardening, taking my daily walk, occasionally running for the bus. It seems that's quite sufficient without labouring away in a gym or running marathons.
So there's no need to demonise the sofa.


