you shouldn't be using physical exercise as a punishment, particularly not with children, how does that give them a healthy view of exercise as a life long enjoyment, when you have soured it as a punishment. my whole generation was soured to the Joy's of running as the school used to make children run round the muddy field in the freezing cold as punishment .
we had a visiting instructor, who took exception to me abandoning the rather dull drill, to show off doing pull ups on a low beam, 20 push ups she barked in a German accent, apart from the sheer absurdity of giving me push ups as a punishment for doing pull ups, I considered it demeaning and just laugh at her, I didn't, though quite tempted, mention allied prisononer of war camps,or that I had been elected chairmen of the escape committee by my fellow detainees, do adults really give any crediance to such punishments in the USA..
and if you made a kid of mine stand with their nose against the wall, I'd punch your lights out