Ours live out and are rising 23 and 7.Both ponies,both ridden 6 days a week,it varies week to week,but we have 1 formal lesson and the rest is hacking over fields and roads,jumping in the field,x country jumping,and a bit of games too.The 23 year old gets worked harder because DD1 mainly rides her and she is confident enough to gallop over the fields.The 7 year old has only been with us 3 weeks and is very green,so we are taking it slowly with him,mainly walk,trot and jumping until I'm sure of how he'll react being cantered in a big field.
hmmmm, was between 1 and (max) 3 hours each per day, 5-6 days a week but only just getting into swing of it again so pony gets about 20-30 mins schooling (some jumping sometimes) then a hack (about an hour) and horse just hacks for an hour and a half. We are mainly walking and trotting everywhere as still perilously slippery out there.
Dhorse when hunting gets a day off after hunting (in the field) and about 1-1.5 hrs twice a week exercise.
Out of season it depends on what I can do really - but he usually gets a minimum of 2 hrs 3 times a week. He lives out (or at least he does when not lame/shoeless/riddled with mud fever) so I feel that counts towards his exercise. When he was boxed 24/7 with mud fever I walked him out on the roads/grazed the verges for about an hour a day - yawn. Luckily he was then able to use a bit of the cattle barn so could trot up and down, roll and get a good leg stretch without getting muddy.
I think the question is 'fit for what'. If you're just hacking and light schooling then if they live out and work for an hour three days a week they should be fine. If they're doing more strenuous work they need to be fitter and so need more exersize. I have to work mine 6 days a week in the Spring though, otherwise she gets fat just on the smell of grass