LIke i said its about being realistic theres certain goals he wont achieve due to the ageing process/inactivity you describe......outright pure strength and aerobic capacity is not one of them in my opinion......it all just takes longer.ive just started biking , i try to do 12 mile a day , as long as i do 1 - 1 1/2 hour a day for 5 days , and it 75% up hills , so getting out of breath alot . i not in bad shape for my age (64) yeh old fart lol , i am just under 6ft and just under 13st , not loosing any weight, but bloody hell i go out like a light when i go to sleep, i am tired t