Death by shuttle run Workout

10 min workout
1. min = 20 m
2. min = 30 m
3. min = 40 m
4. min = 50 m
5. min = 60 m
6. min = 70 m
7. min = 80 m
8. min = 90 m
9. min = 100 m
10. min 110 m

If you fail, start beginning, or try again the same track.