Although during cycling class intensity is modified by changing interval intensity sequencing, it has not been established whether intensity order can alter physiological and perceptual responses within a workout. PURPOSE: To determine the effects of interval intensity sequencing on energy expenditure, physiological markers, and perceptual responses during indoor cycling. METHODS: 10 males (20.0±0.8 yr) and 8 females (21.3±2.7 yr) completed four cycle ergometer sessions. They performed 3 randomly ordered interval bouts (random intervals-RI, ascending intervals-AI, and descending intervals-DI) including three 3-minute work bouts at workloads corresponding to 50%, 75%, and 100% of peak power output (PPO) and three 3-minute recovery periods at 25% PPO. Heart rate (HR) and oxygen consumption (VO2) were measured and expressed as percentages of maximal HR (%HRmax) and VO2 (%VO2max). Energy expenditure was considered for both the work bout (EE) and for the 5-minute recovery period (EE Rec). Session RPE (sRPE) and Exercise Enjoyment Scale (EES) were recorded. RESULTS: No significant differences were found for %HRmax (RI: 73.3±6.1%; AI: 72.1±4.9%; DI: 71.8±4.5%), %VO2max (RI: 51.8±4.6%; AI: 51.4±3.9%; DI: 51.3±4.5%), EE (RI: 277.5±39.9; AI: 275.8±39.4; DI: 274.9±42.1 kcal), EES (RI: 4.9±1.0; AI: 5.3±1.1; DI: 4.9±0.9), and sRPE (RI: 4.9±1.0; AI: 5.3±1.1; DI: 4.9±0.9). EE Rec was significantly (p<0.005) lower after DI (11.9±3.2 kcal) with respect to RI (13.2±2.5 kcal) and AI (13.3±2.5 kcal). CONCLUSIONS: Although lower EE are observed during the recovery period in DI, interval intensity sequencing does not effect overall energy expenditure, physiological markers, and perceptual responses during cycling. This suggests that group cycling instructors can vary workout structure to promote adherence and maintain enjoyability, while achieving the same EE.

Indoor Cycling Energy Expenditure: Does Sequence Matter?

Cortis Cristina
;
2018-01-01

Abstract

Although during cycling class intensity is modified by changing interval intensity sequencing, it has not been established whether intensity order can alter physiological and perceptual responses within a workout. PURPOSE: To determine the effects of interval intensity sequencing on energy expenditure, physiological markers, and perceptual responses during indoor cycling. METHODS: 10 males (20.0±0.8 yr) and 8 females (21.3±2.7 yr) completed four cycle ergometer sessions. They performed 3 randomly ordered interval bouts (random intervals-RI, ascending intervals-AI, and descending intervals-DI) including three 3-minute work bouts at workloads corresponding to 50%, 75%, and 100% of peak power output (PPO) and three 3-minute recovery periods at 25% PPO. Heart rate (HR) and oxygen consumption (VO2) were measured and expressed as percentages of maximal HR (%HRmax) and VO2 (%VO2max). Energy expenditure was considered for both the work bout (EE) and for the 5-minute recovery period (EE Rec). Session RPE (sRPE) and Exercise Enjoyment Scale (EES) were recorded. RESULTS: No significant differences were found for %HRmax (RI: 73.3±6.1%; AI: 72.1±4.9%; DI: 71.8±4.5%), %VO2max (RI: 51.8±4.6%; AI: 51.4±3.9%; DI: 51.3±4.5%), EE (RI: 277.5±39.9; AI: 275.8±39.4; DI: 274.9±42.1 kcal), EES (RI: 4.9±1.0; AI: 5.3±1.1; DI: 4.9±0.9), and sRPE (RI: 4.9±1.0; AI: 5.3±1.1; DI: 4.9±0.9). EE Rec was significantly (p<0.005) lower after DI (11.9±3.2 kcal) with respect to RI (13.2±2.5 kcal) and AI (13.3±2.5 kcal). CONCLUSIONS: Although lower EE are observed during the recovery period in DI, interval intensity sequencing does not effect overall energy expenditure, physiological markers, and perceptual responses during cycling. This suggests that group cycling instructors can vary workout structure to promote adherence and maintain enjoyability, while achieving the same EE.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11580/69126
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