title: Effects of dynamic stretching on energy cost and running endurance performance in trained male runners.
abstract: The purpose of this study was to examine the effects of dynamic stretching on running energy cost and endurance performance in trained male runners. Fourteen male runners performed both a 30-minute preload run at 65% VO2max and a 30-minute time trial to assess running energy cost and performance, respectively. The subjects repeated both the trials after either 15 minutes of dynamic stretching (i.e., experimental condition) or quiet sitting (i.e., control condition) while the order was balanced between the subjects to avoid any order effect. The total calories expended were determined for the 30-minute preload run, whereas the distance covered was measured in the time trial. Average resting VO2 increased significantly (p < 0.05) after dynamic stretching (prestretch: 6.2 ± 1.7 vs. poststretch: 8.4 ± 2.1 ml·kg(-1)·min(-1)) but not during the quiet-sitting condition. Caloric expenditure was significantly higher during the 30-minute preload run for the stretching (416.3 ± 44.9 kcal) compared with that during the quiet sitting (399.3 ± 50.4 kcal) (p < 0.05). There was no difference in the distance covered after quiet sitting (6.3 ± 1.1 km) compared with that for the stretching condition (6.1 ± 1.3 km). These findings suggest that dynamic stretching does not affect running endurance performance in trained male runners.
authors.affiliation: Department of Nutrition, Food, and Exercise Sciences, The Florida State University, Tallahassee, Florida, USA.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Zourdos
authors.forename: Jacob M
authors.initials: JM
authors.lastname: Wilson
authors.forename: Brian A
authors.initials: BA
authors.lastname: Sommer
authors.forename: Sang-Rok
authors.initials: SR
authors.lastname: Lee
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Park
authors.forename: Paul C
authors.initials: PC
authors.lastname: Henning
authors.forename: Lynn B
authors.initials: LB
authors.lastname: Panton
authors.forename: Jeong-Su
authors.initials: JS
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D018592:Cross-Over Studies; D004734:Energy Metabolism; D006339:Heart Rate; D006801:Humans; D008297:Male; D052580:Muscle Stretching Exercises; D010101:Oxygen Consumption; D010807:Physical Endurance / Q000502:physiology*; D012420:Running / Q000502:physiology*; D055815:Young Adult