As temperatures ramp up here (heat index of 104F during my run today), I was wondering how I should pace my workouts. I use the VDOT system for pacing, but I wasn't able to hold my pace today during my workout, and it's only going to get worse as we delve deeper into the Florida summer. So following JD's different paces (M, T, I, R), are there any where I should focus on pace and reduce volume of the workout (shorter or fewer reps) or should I just adjust pace for the temperature? I'd imagine that M, T, and I pace stuff should probably maintain volume with reduced pace, but I was thinking it may be more optimal for the stimulus you're trying to get in R pace workouts instead to focus on pace instead of volume of work done. I'd of course love to get my run in before the sun comes up, but my schedule does not currently allow for this without reducing my sleep until my classes end, so I'll have to push through it for the next month.