20 min Hi Intensity workout GCN

4 minutes of WarmUp at zone endurance
30 seconds of flatout at zone VO2-MAX
1 minute 30 seconds of recovery at zone recovery
45 seconds of flatout at zone VO2-MAX
2 minutes of recovery at zone endurance
1 minute of flatout at zone VO2-MAX
2 minutes of recovery at zone endurance
45 seconds of flatout at zone VO2-MAX
1 minute 30 seconds of recovery at zone endurance
30 seconds of flatout at zone VO2-MAX
1 minute 30 seconds of recovery at zone endurance
10 seconds of sprint at zone sub-maximal
50 seconds of threshold at zone super-LT
10 seconds of sprint at zone sub-maximal
2 minutes 50 seconds of warmdown at zone recovery