Table 1. Details of the high-intensity interval training interventions. HIITlong HIITlong RST RST Session 1 Session 2 Session 1 Session 2 Week 1 Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 95%MAS Relief intensity: passive Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 95%MAS Relief intensity: passive Sets: 6 Work duration: 4W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 4W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Week 2 Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 95%MAS Relief intensity: passive Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 95%MAS Relief intensity: passive Sets: 6 Work duration: 4W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 4W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Week 3 Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 6W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 6W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Week 4 Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 2 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 6W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 6W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Week 5 Sets: 6 Work duration: 3 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 3 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 8d30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 8W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Week 6 Sets: 6 Work duration: 3 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 3 min Relief duration: 2 min Work intensity: 100%MAS Relief intensity: passive Sets: 6 Work duration: 8W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS Sets: 6 Work duration: 8W30-m sprints Relief duration: 20s / sets: 5 min Work intensity: all-out Relief intensity: 50% MAS HIITlong: long interval high-intensity interval training; RST: repeated sprint training; MAS: maximal aerobic speed.