Perpetually Tired

If there is one thing that I have learnt in the past few months of Ironman training it is that I am perpetually tired. I think that I could fall asleep anywhere at anytime. I base all of this on the following training schedule - times are when the alarm goes off.

Sunday (Long Run or Race) @ 05h00
Monday (yahoo, rest day) @06h30
Tuesday (Cycle) @ 04h10
Wednesday (Swim) @ 04h50
Thursday (Cycle) @04h10
Friday (Swim) @04h50
Saturday (Cycle) @04h30

This all requires that I go to bed before 20h00.