title: The effects of specific preconditioning activities on acute sprint performance.
abstract: Previous research suggests that specific preconditioning activities such as whole-body vibration (WBV) and resistance training may play an important role in ensuing dynamic activities. The purpose of this study was to examine the effects of 2 preconditioning activities, WBV and power cleans (PC), on acute sprint performance. Two studies were conducted in which 14 (WBV) and 9 (PC) male track and field athletes were subjects. The WBV treatment consisted of 4 bouts of 5 seconds of high-knee running on a vibrating platform at 0, 30, 40, or 50 Hz. The PC treatment consisted of 3 PC reps at 90% 1RM. In both cases, acute sprint performance was the dependent variable of interest. For WBV, split times were recorded at 10, 20, and 40 m. Reaction times (RXN) as well as 5-, 10-, and 40-m split times were recorded for the PC study. Results indicated no significant differences between treatment and nontreatment groups for both studies. However, significant correlations were present between RXN and 5-m splits (r = 0.65) and RXN and 10-m splits (r = 0.63), although they decreased as a function of sprint distance to r = 0.43 at 40 m. These results suggest little efficacy for the use of WBV and PC as a means of augmenting acute sprint performance. However, a trend within the 30-Hz protocol may suggest that WBV as part of a warm-up for sprinting activities greater than 40 m (i.e., 100 m) could potentially result in a decreased sprint time of nearly 1/10th of a second, which is worth future consideration.
authors.affiliation: Department of Health, Physical Education, Recreation, and Dance, University of Idaho, Human Performance Laboratory, Moscow, Idaho, USA. gugg7753@vandals.uidaho.edu
authors.forename: Joshua D
authors.initials: JD
authors.lastname: Guggenheimer
authors.forename: D Clark
authors.initials: DC
authors.lastname: Dickin
authors.forename: Gabriel F
authors.initials: GF
authors.lastname: Reyes
authors.forename: Dennis G
authors.initials: DG
authors.lastname: Dolny
mesh_terms: D000704:Analysis of Variance; D054874:Athletic Performance; D006801:Humans; D008297:Male; D055070:Resistance Training / Q000379:methods*; D012420:Running / Q000502:physiology*; D014142:Track and Field / Q000502:physiology*; D014495:Universities; D014732:Vibration; D055815:Young Adult