Event Title

The Effects Of Lower Body Fatigue On Vertical Jump Ground Reaction Forces

Presenter Information

Christina Cooper

Presentation Type

Poster Presentation/Art Exihibt

College

College of Natural Sciences

Major

Kinesiology

Location

Event Center BC

Faculty Mentor

Dr. Nicole Dabbs

Start Date

5-18-2017 11:00 AM

End Date

5-18-2017 12:00 PM

Abstract

Purpose: Ground reaction forces and a decrease in muscular force- generating capacity can both be used to measure fatigue. Therefore, the purpose of this study is to determine the effects of lower body fatigue on ground reaction force measures. Methods: Nineteen recreationally trained males and females participated in a combined familiarization and testing session. Participants were familiarized with two types of vertical jumps and fatiguing protocol. Three trials for both the static jump (SJ) and countermovement vertical jump (CMVJ) were performed on a force plate, pre and post Bosco Protocol. The dependent variables calculated from the force plate were rate of velocity development (RVD), peak force (PF), impact force (IF), peak velocity (PV), and peak power (PP). Paired-sampled t-tests were used to analyze pre/post differences for each dependent variable. Results: There was a significant difference between pre and post PF (p=0.003; pre=1,523.68 ± 360.65N; post= 1,464.03 ± 342.24N), IF (p=0.001; pre= 1,175.02 ± 1142.37N; post= 1355.05 ± 987.34N), PV (p=0.002; 2.63 ± .36; post= 2.38 ± .51m/s), and PP (p=0.001; pre= 3373.09 ± 1088.92m/s; post= 2922.89 ± 1100.00m/s) measures for CMVJ. There was a significant difference pre and post measures for SJ peak force (p=0.001; pre= 1298.95 ± 261.97N; post= 1230.60 ± 261.97N). Conclusion: Bosco protocol showed a significant decreased in PF, IF, PV, and PP for CMVJ and a significant decrease in PF for SJ. Results showed that performing a high-intensity multi joint activity, Bosco protocol, can lead to muscle fatigue and significantly alter force production recreationally trained populations.

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May 18th, 11:00 AM May 18th, 12:00 PM

The Effects Of Lower Body Fatigue On Vertical Jump Ground Reaction Forces

Event Center BC

Purpose: Ground reaction forces and a decrease in muscular force- generating capacity can both be used to measure fatigue. Therefore, the purpose of this study is to determine the effects of lower body fatigue on ground reaction force measures. Methods: Nineteen recreationally trained males and females participated in a combined familiarization and testing session. Participants were familiarized with two types of vertical jumps and fatiguing protocol. Three trials for both the static jump (SJ) and countermovement vertical jump (CMVJ) were performed on a force plate, pre and post Bosco Protocol. The dependent variables calculated from the force plate were rate of velocity development (RVD), peak force (PF), impact force (IF), peak velocity (PV), and peak power (PP). Paired-sampled t-tests were used to analyze pre/post differences for each dependent variable. Results: There was a significant difference between pre and post PF (p=0.003; pre=1,523.68 ± 360.65N; post= 1,464.03 ± 342.24N), IF (p=0.001; pre= 1,175.02 ± 1142.37N; post= 1355.05 ± 987.34N), PV (p=0.002; 2.63 ± .36; post= 2.38 ± .51m/s), and PP (p=0.001; pre= 3373.09 ± 1088.92m/s; post= 2922.89 ± 1100.00m/s) measures for CMVJ. There was a significant difference pre and post measures for SJ peak force (p=0.001; pre= 1298.95 ± 261.97N; post= 1230.60 ± 261.97N). Conclusion: Bosco protocol showed a significant decreased in PF, IF, PV, and PP for CMVJ and a significant decrease in PF for SJ. Results showed that performing a high-intensity multi joint activity, Bosco protocol, can lead to muscle fatigue and significantly alter force production recreationally trained populations.