>Fats can be burned in muscle but it is > most efficient above 60% of VO2 max (the maximum consumption of energy the > person is capable of.) Fat serves for long duration exercise.
Mmmmm... I was on a fat-and-greens diet for 2 months ( no breaks on weekends ) about 2 yrs ago and worked out 5 or 6 days a week. My body had never been so fit and muscular!