I think it's important to give your body a full day of rest at least the day before the event.
I'm training for a half marathon coming up towards the end of June. In all my research online in half-marathon training schedules (mine is 8 weeks), at no point do I actually do a full 13 miles until the actual race, and the week before the race (it's on a Sunday), I drop from doing 10 miles the Sunday previous, down to 3 miles on Monday, 5 miles on Wednesday and then 2 miles on Friday.
Will be interesting to see how this works - I've never trained for a half marathon. Haha. But yeah, I bet it's all based on the periodization mentioned below.
Original weight in 2002: 220
Original weight when joining Spark 1/8/06: 149
| current weight: 131.0