Rest time. Save it.
That's just me, though. I'm glad when I'm not tired after a workout because it means I'm probably not overtraining.
For instance, today was my highest weight day of the workout week. I'm not tired and feel like I could do the whole workout over again. I'm glad I'm so energized, though, because it usually means that I'll have good workouts next week.
However, if I'm beat after today's workout, it's probably time to take a week and recover.
|