Week one
5-minute run intervals
Intensity 85% maximum heart rate
Rest 4 minutes
Sets 3
Week two
2-minute run intervals
Intensity 90% maximum heart rate
Rest 2 minutes
Sets 7
Week three
1-minute run intervals
Intensity 95% maximum heart rate
Rest 1 minute
Sets 15
Week four
Sprint 60m, turn around & sprint back
Intensity 20 seconds out, 20 seconds back
Rest 1 minute
Sets 8-10
Week five
60m sprints
Intensity 100% maximum heart rate
Rest 10 seconds
Sets 8-10