There’s a bit of silly about this Guardian article. A chap in the US is advocating using your baby as a weightlifting tool.
http://www.guardian.co.uk/lifeandstyle/2011/jun/27/baby-can-keep-dad-fit I suppose it has some advantages as it is low cost and, as long as you feed your baby, has progressive resistance built in.
The weight is still pretty light though, unless you keep it up until they are much older. I guess the ‘ever shifting nature’ of the weight would make it harder though, just like a sandbag.
In seriousness this kind of thing is great for dads to be doing with their kids. It doesn’t have to be a workout though. We can just get on the floor, tumble and bond.
Any thought of sets and reps are not required, but if it gets some dads more involved with their kids that can only be a good thing.