so last night i couldn't sleep and saw tony hortons 10 min trainer infomercial. lately i have been feeling burnt out from working out even though i'm taking 2 days rest during the week. my workouts are usually 1hr per day 5 days a week. my thought was mabe i could get these workouts and do one in the a.m. and one in the p.m. But i worry that going from 1hr per day to 20 min per day is not enough since my body is used to longer duration workouts. also, do you think that these workouts are intense enough to challenge someone who has been working out for 10 yrs?