Graduation Date
Summer 2021
Document Type
Thesis
Program
Master of Science degree with a major in Kinesiology, option Exercise Science
Committee Chair Name
Dr. Justus Ortega
Committee Chair Affiliation
HSU Faculty or Staff
Second Committee Member Name
Dr. Jill Anderson
Second Committee Member Affiliation
HSU Faculty or Staff
Third Committee Member Name
Dr. Brian Blackburn
Third Committee Member Affiliation
HSU Faculty or Staff
Subject Categories
Kinesiology
Abstract
Compared to road running, those who run off-road face many unique challenges that impact their running mechanics and energetics. Current literature fails to address how the turns encountered on off-road paths might influence running performance. Therefore, we aimed to investigate the effects of turn angle and frequency on the energetic cost of running. Twelve young adult runners (21±3 years) who run ≥ 30 miles/week and who can run < 22 min for 5 kilometers participated in this study. All subject performed four trials: one straight path trial and three turning paths trials with combined spatial frequencies (ξ- cycles per meter) and amplitudes (meters) of 0.083SF:4AMP, 0.167SF:4AMP, and 0.167SF:2AMP, respectively. Using breath by breath portable gas analysis, we measured V̇O2 and V̇CO2 in the last 2 minutes of each 6-minute trial to determine metabolic power (Watt/kg). Statistical analysis utilized a repeated measures analysis of variance (ANOVA) and a post-hoc paired-sampled T-test to evaluate differences in energetic costs between paths. Compared to a virtually straight path, runners on average consumed 14% and 27% more metabolic energy on a path with turns of 0.167:2 (p=.002) and 0.167:4 (p
Citation Style
APA
Recommended Citation
Grimmitt, Adam B., "The effects of turn amplitude and spatial frequency on the energetic cost of running" (2021). Cal Poly Humboldt theses and projects. 503.
https://digitalcommons.humboldt.edu/etd/503