Objectives:To determine whether providing a choice between high-intensity interval training(HIIT)and moderateintensity continuous training(MICT)within a 4-week diabetes prevention program may lead to greater perceived...Objectives:To determine whether providing a choice between high-intensity interval training(HIIT)and moderateintensity continuous training(MICT)within a 4-week diabetes prevention program may lead to greater perceived autonomy support,motivation regulation,free-living physical activity,and cardiorespiratory fitness 6 months postintervention when compared to imposed exercise.Methods:In a preliminary pragmatic randomized trial,77 individuals at risk of type 2 diabetes(Mage=61.5(±9.8)years;Nfemales=58)were randomized to one of three exercise conditions:HIIT,MICT,or the choice thereof(CHOICE).Perceived autonomy supportwas assessed post-intervention.Changes in motivation,physical activity,and cardiorespiratory fitness were assessed 6 months post-intervention.Linear mixed models and Bonferroni-adjusted pairwise comparisons on estimated marginal means were used to derive effect estimates after adjusting for stratified allocation factors.Results:Perceived autonomy support was not different among conditions[F(2,47)=0.068,p=0.934].No effects were detected for motivation regulation,physical activity,or cardiorespiratory fitness(ps>0.05).Participants in the CHOICE condition self-reported significantly more physical activity 6 months post-intervention compared to preintervention[t(31)=2.922,p=0.019].Improvements in cardiorespiratory fitness were seen in CHOICE[t(65)=2.509,p=0.044]and MICT[t(65)=3.492,p=0.003].Conclusions:Providing choice between HIIT and MICT did not significantly affect individuals’perceived autonomy support or motivation regulation compared to imposed exercise.However,physical activity and cardiorespiratory fitness improved over time for the CHOICE condition.Providing choice between HIIT and MICT may be a feasible exercise strategy among this population.展开更多
基金funded by a Grant-in-Aid program provided to the corresponding author by the Heart&Stroke Foundation of Canada(G-18-0022225).
文摘Objectives:To determine whether providing a choice between high-intensity interval training(HIIT)and moderateintensity continuous training(MICT)within a 4-week diabetes prevention program may lead to greater perceived autonomy support,motivation regulation,free-living physical activity,and cardiorespiratory fitness 6 months postintervention when compared to imposed exercise.Methods:In a preliminary pragmatic randomized trial,77 individuals at risk of type 2 diabetes(Mage=61.5(±9.8)years;Nfemales=58)were randomized to one of three exercise conditions:HIIT,MICT,or the choice thereof(CHOICE).Perceived autonomy supportwas assessed post-intervention.Changes in motivation,physical activity,and cardiorespiratory fitness were assessed 6 months post-intervention.Linear mixed models and Bonferroni-adjusted pairwise comparisons on estimated marginal means were used to derive effect estimates after adjusting for stratified allocation factors.Results:Perceived autonomy support was not different among conditions[F(2,47)=0.068,p=0.934].No effects were detected for motivation regulation,physical activity,or cardiorespiratory fitness(ps>0.05).Participants in the CHOICE condition self-reported significantly more physical activity 6 months post-intervention compared to preintervention[t(31)=2.922,p=0.019].Improvements in cardiorespiratory fitness were seen in CHOICE[t(65)=2.509,p=0.044]and MICT[t(65)=3.492,p=0.003].Conclusions:Providing choice between HIIT and MICT did not significantly affect individuals’perceived autonomy support or motivation regulation compared to imposed exercise.However,physical activity and cardiorespiratory fitness improved over time for the CHOICE condition.Providing choice between HIIT and MICT may be a feasible exercise strategy among this population.
