Fartlek: 5 Sets by 650 M @ 2:36 (4:00/K) Intermixed With a 1-Minute Jog Between Sets

May 29, 2019
Warm Up 3.4 K: 20:00.00
1st 650 M: 2:33.33
Jog 200 M: 1:01.08
2nd 650 M: 2:21.93
Jog 200 M: 1:00.81
3rd 650 M: 2:34.77
Jog 200 M: 1:00.14
4th 650 M: 2:32.24
Jog 200 M: 1:00.94
5th 650 M: 2:32.09
Jog 5 K: 30:03.75
1 K: 3:55.39
Total 13.45 K: 1:10:36.47

A week ago when I first gave a go at 650 M repeats @ 2:36 with a minute's rest between sets, I already failed to achieve the target in the second set, and I had no choice but taking a longer rest to sustain the training. But a week later I was able to run all of five sets under the target. I renewed my confidence in human ability to adapt to a stimulus given.

After the fast run session, I cruised along the 6 K shuttle course above in bare feet as I held my shoes in my hands. It was tremendously refreshing to run without shoes at an easy pace especially after the hard and strenuous speed training.

But with 1 K remaining, I remembered the teaching by late Yoshio Koide, and put on a spurt and kicked to the finish.

I ran the last K well under 4:00. 

Running at a faster pace is becoming less difficult. My next question is, "How often can I repeat it?" And also, "How far can I continue to run at the same pace?" My tentative answer is, "At least one time more." In the next fartlek session I will aim for 6 sets. Same pace. Same rest.