So this is the second season of noticed it. But everytime I thrown on spikes for an XC race. My legs feel completely done half way through the race and I race well under my potential considering my fitness.
For example I last year I ran 40-55 miles a week during cross and ran 4 races. Mind you they are different course.
Race 1 8k = 27:30 (flats)
Race 2 8k = 29:45 (spikes) (griak invitational)
Race 3 8k = 28:30 (spikes)
Race 4 8k = 27:21 (flats)
This year is pretty much the same so far. Except I'm running 60-75 miles a week (all of august)
Race 1 8k = 26:50
Race 2 8k = 29:33
.....
.....
I wear Nike zoom streak lt 2s for flats and Nike victory xc's (2s and 3s)
Any insight would help. Should I strike to flats and risk slipping? I'm I using different muscle groups?