I do interval training for an hour a day 6 days aweek it called insanity. i also run 2-3x aweek 3-6 miles. an i go to the gym 4 days aweek. today was the first day i felt wicked tired an could not keep my eyes open. so i did nothing an now i feel guilty.

Commendable but rest: Your exercise program sound vigorous and should be commended, but the muscles also need time to rest and rebuild. Your tiredness could be how it's telling you to take a rest for a day. If the tiredness remains despite the rest, see your doctor to rule out other causes.

Recovery days: You should speak with a trainer about the importance of recovery days and adequate rest to avoid fatigue and injury.