SDSU Aztec wrote:
LateRunnerPhil wrote:
I'm in 16:15 5k shape atm, and ran a 55 min easy run today in 8:45/mile. If you do workouts right, you wouldn't want to run any faster on your easy days. These days are when recovery takes place after quality workouts.
Sure, I could run around 6:50/mile every day for 50 mins if I wanted to (not doing any workouts), but that wouldn't be efficient training. I'd just condition my body to run 6:50/mile, and if I had to enter a race at say 5:10/mile, I would fall apart after a few minutes.
What? I ran my over distance at 6:30 to 7:00 pace and could race at a much faster clip. John Walker was said to have done much of his easy running at 5:30 pace, but could still manage to run a little faster than that in races.
Rupp/Farah did easy runs at ~5:30/mi too, Cain did them at 6:30/mi. All roughly ~80-90s/mile above 5k race pace. Sure, they are getting a lot of bang for the buck, but it only works if they can recover and still hit their key workouts.
These are runners with VO2MAX values in the 80s (70s for female), or in other words - their aerobic system is extremely strong. Because they can still recover and hit key workouts running 80-90s/mile above 5k pace on their easy days, doesn't mean the average Joe can. Someone who only runs a 15-20 min 5k, has a lower VO2MAX, in the 50s-mid 60s, and will need a slower easy pace to recover from key workouts.
I assume muscle fibers also have to do with it, someone with lots of ST can run long and at a decent clip, a FT guy will struggle with faster paces on a daily basis since he can't always just recruit his FT fibers. Farah and Rupp are obviously very ST, but the average Joe might be a 50/50 mix and unable to do easy runs in 7:30/mi if his 5k race pace is 6:00/mi.