Having done an hour's light gardening yesterday, and now aching all over, unable to bend and stiff as a plank, I think I need to exercise more, let alone the kids of today .....
PE was mandatory at my secondary school in the early years 11-13, two periods a week - and house sports were on top of that, at least one, sometimes two afternoons a week. Add in the frowned-upon (it was a rugby school) regular lunchtime soccer sessions, as Cromwell said, and it was a wonder we had time for academics!