Sprint Repeats - Optimized Version…

​Warm-up

* 0.5 mile walk to gym

Intervals (10x)

* Walk 0.10 @ 3.3 

* Sprint 1: 0.10 @ 6.0 

* Walk 0.10 

* Sprint 2: 6.5 

* Walk 0.10 

* Sprint 3: 7.0 

* Walk 0.10

* Sprint 4: 7.3 

* Walk 0.10

* Sprint 5: 7.5 

* Walk 0.10

* Sprint 6: 7.7 

* Walk 0.10

* Sprint 7: 7.8 

* Walk 0.10

* Sprint 8: 7.9 

* Walk 0.10

* Sprint 9: 7.9 

* Walk 0.10

* Sprint 10: 8.0 

Target Metrics

* Average HR: 140–150 bpm

* Peak HR: 170–180 bpm (briefly)

* Recovery: HR should drop 25–40+ bpm during each walk

* RPE: 8–9/10, not all-out

AVG HR - 144 BPM

MAX HR - 192 BPM

Last Time:

AVG HR - 142 BPM

MAX HR - 188 BPM

Recovery Afterward

* Walk 1.66 miles home

AVG HR - 110 BPM

MAX HR - 121 BPM