"They don't have time to get the kind of sustained exercise (20 to 40 minutes every other day is one recommended"

Sorry but I reject that notion too. People make time for what is nessessary to maintain their health - once they decide it's in their best interests. It sounds like the biggest health hurtle this person needs to overcome is their own inner voices. Anybody can go for a walk or a dip in a motel pool. Even if it means getting up 30 minutes earlier.