SUPERIOR COACH JS wrote:
Best advice is: Stop guessing how much rest you need! Let your heart decide how much rest you really need after EVERY rep. Wait easy Walking until back to 120 bpm ( or roughly 60% of MHR). Test it out,you will be positive surprised! Good luck!
- The Magic Wizard - :)
JS is both right and wrong.
He is right that you should not be obsessed with an "exact" rest period for most workouts. Sufficient recovery to run at the intended efforts in GENERALLY what you want.
He is WRONG that you need to rely on your heart rate for "every" rep. If you actually know your body, which you want to, you should be able to do this by feel.
For example, recentlyI did 6x1000 at 5k pace, with 400 jog recovery. Between the first few, I jogged pretty much straight through, in 1:50 or so. By last two, I was walking a bit and jogging most of it, in 2:00-2:20. I did not look at the time OR the heartrate AT ALL during the rest, but I know by FEEL when I was READY for the next rep. Looking at my data afterward, I see that the recovery was to almost exactly 120bpm each time, with the rest getting longer through the workout.
Finally, he is also WRONG that you always want to ignore the duration of your recovery. For some mile/800/400 pace workouts, for example, you specifically WANT to accumulate and run through a certain amount of acidosis. You also want to be able to measure your improvement at doing the same workout. So sometimes the precise duration of rest DOES matter. (e.g. 10x400 at 1500 pace with 1:00 rest, 4x400 at 800 pace with 4:00 rest), 300,200 at 400 pace with 2:00 rest).