Dixon, C B, FACSM

Lesniak, A Y

Thompkins, K M

English

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           Effect of Light Brightness on Cycling Performance     Kharizma M. Thompkins, Ashley Y. Lesniak, Curt B. Dixon, FACSM. Lock Haven University, Lock Haven, PA  Many spin classes are conducted in dark rooms in gyms.  PURPOSE: To investigate if light brightness impacts cycling performance or perception of effort. METHODS: Six men (age: 21.5 ± 0.8 yr; height: 176.4 ± 6.5 cm; mass: 87.0 ± 7.6 kg; body fat: 14.6 ± 4.7%) and five women (age: 21.0 ± 1.2 yr; height: 165.1 ± 4.8 cm; mass: 69.1 ± 20.2 kg; body fat: 25.9 ± 11.6%) completed a maximal workload test and three light brightness trials on a cycle ergometer.  During session one, subjects completed a graded exercise test to volitional fatigue to determine maximal workload.  Using their preferred pedaling cadence (RPM) and a standard exercise intensity (70% of their maximum workload), a distance goal was calculated for each subject.  On separate days, subjects were instructed to complete their distance goal as quickly as possible under three light brightness conditions: dim (D; 5 luxes), ambient (A; 200 luxes), and bright (B; 750 luxes). The testing order of the light brightness trials was determined by counterbalanced assignment. Heart rate (HR), Ratings of Perceived Exertion (overall = RPE-O; peripheral = RPE-P), and blood lactate were measured during the exercise trials for statistical comparison. Repeated Measures ANOVAs were used to determine differences between the different light brightness conditions. RESULTS: There was no significant difference in completion time (D: 30.4 ± 3.2, A: 28.2 ± 9.6, B: 30.8 ± 3.9 min; p = .386), HR (D: 157.0 ± 12.1, A: 155.0 ± 13.4, B: 155.4 ± 10.8 b·min-1; p = .845), average RPE-O (D: 13.5 ± 2.1, A: 13.7 ± 2.0, B: 14.0 ± 1.3; p = .618), average RPE-P (D: 14.6 ± 1.9, A: 14.7 ± 2.0, B: 14.8 ± 1.1; p = .690) or average blood lactate (D: 5.8 ± 1.5, A: 6.1 ± 2.2, B: 6.2 ± 2.9 mmol·L-1 ; p = .913) between the light brightness conditions.  CONCLUSION:  Variations in light brightness had no impact on cycling performance or perception of effort.     Supported by Lock Haven University’s Annual Campus Grant  Mid Atlantic Regional Chapter of the American College of Sports Medicine  45th Annual Scientific Meeting, November 4th- 5th, 2022 Conference Proceedings International Journal of Exercise Science, Issue 9, Volume 11 

Effect of Light Brightness on Cycling Performance

https://digitalcommons.wku.edu/cgi/viewcontent.cgi?article=6701&context=ijesab

Effect of Light Brightness on Cycling Performance

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