Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Date of Award

Summer 2016

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Department of Kinesiology

Advisor(s)

Nick Luden

Abstract

We examined the effects of one night of sleep restriction (Sleep-; 2.5 hrs) on subsequent 3-km cycling performance and skeletal muscle recovery from heavy exercise compared to a full night of rest (Sleep+; 7 hrs). Seven recreational cyclists (n=6 male, n=1 female; age = 24.4 ± 7 yrs; height = 170 ± 10 cm; weight = 68 ± 13 kg VO2max = 61.5 ± 4.4 ml/kg/min) completed four simulated 3-km time trials (TT) and six peak isokinetic torque trials at different speeds (30 and 120°/sec) under both conditions. The first exercise trial (EX1) consisted of baseline testing followed by heavy exercise (60 min interval session + resistance exercise) in the evening, while follow-up testing occurring in the morning of the next two days (EX2 and EX3) . TT performance and peak torque were assessed on the evening of EX1 between 3-5pm and between 8-10am the following morning (EX2), while only peak torque was assessed during the same morning time on EX3. Magnitude-based inferences were used to evaluate all variables. Sleep- clearly impaired average power output (-12.7 ± 1%) and overall time (-3.5 ± 0.39%) of TT performance compared to Sleep+, while there was no clear impact of sleep on peak torque at either speed. The current study demonstrates the importance of sleep on recovery from heavy exercise with potential differences in exercise types, and warrants further research on the topic.

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