B-36 Free Communication/Poster - Physical Activity and Affect Wednesday, May 28, 2014, 1:00 PM - 6:00 PM Room: WB1
High-intensity interval training (HIIT) has recently been examined as a more efficacious protocol for producing health and performance benefits in comparison to traditional continuous aerobic exercise. However, investigation into the perceptual responses associated with interval training is still in its infancy, and have yet to be examined in overweight and sedentary individuals.
PURPOSE: Investigate the affective and enjoyment responses to continuous and interval exercise.
METHODS: 20 low-to-moderate risk participants (11 female, 9 male; mean age = 22 years, BMI = 29) completed a VO2max test (mean = 27 ml/kg/min) followed by four counterbalanced trials comprised of a 20-minute continuous trial (CH) just above the ventilatory threshold (VT), and three 24-minute interval trials near peak power that utilized 1:1 work-to-recovery ratios: 30 seconds (IS30), 60 seconds (IS60), and 120 seconds (IS120).
RESULTS: Data was analyzed using RM ANOVA and pairwise comparisons. Affect declined during all trials (p < 0.05) but was best preserved during the IS30 in comparison to all other trials (3.4 ± 1.1 to 2.8 ± 1.2; ES = 0.5). Notably, in-task affective valence and perceived enjoyment were significantly more positive during IS30 and IS60 in comparison to CH and IS120 (p < 0.05). Post-exercise affect was significantly greater in IS30 (3.7 ± 1.2) and IS60 (3.7 ± 1.4) than IS120 (3.1 ± 1.8) and CH (3.0±1.4; p < 0.05). Post-exercise enjoyment was significantly greater in IS60 (98 ± 15) than CH (82 ± 19) and IS120 (83 ± 24; p < 0.05).
CONCLUSIONS: These findings suggest that severe intensity intervals comprised of either 30 or 60 seconds facilitate more favorable perceptual responses of affective valence and perceived enjoyment than heavy intensity continuous exercise and severe intensity intervals of 120 seconds. Favorable perceptual responses associated with high-intensity interval training may be relevant for the development of future exercise protocols aimed at improving exercise program adherence.