Saanijoki T, et al. – This study incorporated the analysis of the affective responses to repeated sessions of sprint interval training (SIT) in comparison with moderate–intensity continuous training (MICT) in insulin resistant individuals. It was illustrated that the perceptual and affective responses were more negative both during and acutely after SIT compared with MICT in untrained insulin resistant adults. Marked improvements were reported by such responses, already within six training sessions, which suggested rapid positive affective and physiological adaptations to continual exercise training, both SIT and MICT. A very intense SIT was found to be a mentally tolerable alternative for untrained people with insulin resistance.