Table 1.

Description of the interval training sessions.

Session	Work duration	Work target intensity	Recovery duration	Recovery target intensity	Number of repetitions/set	Number of sets	Rest between sets
HIIT-15	15 s	110% PPO	15 s	30% PPO	20	2	5 min
HIIT-30	30 s	110% PPO	30 s	30% PPO	10	2	5 min
HIIT-60	1 min	130% PPO	3 min	Choice	6	1	–
SIT	30 s	All-out	3 min 30	Choice	6	1	–

PPO, peak power output; Choice: the athletes could rest passively or paddle slowly.