title: The effect of a competitive collegiate football season on power performance and muscle oxygen recovery kinetics.
abstract: Ten intercollegiate football players were tested within 3 days prior to (T1) and the day following the end (T2) of football preseason training camp and during weeks 7 (T3) and 11 (T4) of the competitive season. During each testing session, subjects performed a 30-second Wingate anaerobic power test. Near-infrared continuous wave spectroscopy was used to measure muscle deoxygenation during exercise. No changes in any power performance measures were seen during the competitive football season. A significant (p < 0.05) decrease in the extent of deoxygenation during exercise was observed between T2 (72.6 +/- 19.4%) and T4 (50.2 +/- 14.2%). A 30 and 29% difference (p < 0.05) in the onset of reoxygenation was observed between T1 and T3 and T4, respectively. A 51% decrease (p < 0.05) in halftime recovery was observed between T2 and T3. Results indicate that the extent of muscle deoxygenation is reduced during high-intensity exercise and that muscle oxygen recovery kinetics improves over the duration of a competitive season of football.
authors.affiliation: The College of New Jersey, Ewing, New Jersey 08628, USA. hoffmanj@tcnj.edu
authors.forename: Jay R
authors.initials: JR
authors.lastname: Hoffman
authors.forename: Joohee
authors.initials: J
authors.lastname: Im
authors.forename: Jie
authors.initials: J
authors.lastname: Kang
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Ratamess
authors.forename: Shoko
authors.initials: S
authors.lastname: Nioka
authors.forename: Kenneth W
authors.initials: KW
authors.lastname: Rundell
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Kime
authors.forename: Joshua
authors.initials: J
authors.lastname: Cooper
authors.forename: Britton
authors.initials: B
authors.lastname: Chance
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D005538:Football / Q000502:physiology*; D006801:Humans; D007700:Kinetics; D008297:Male; D018482:Muscle, Skeletal / Q000378:metabolism* / Q000502:physiology; D010100:Oxygen / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology
chemical_list: D010100:Oxygen