https://scholarworks.moreheadstate.edu/student_scholarship_posters/1110/thumbnail.jp

Crum, Keisha

Foster, Andrea

Gonzalez, Gina

Humphreys, Luke

Pickering, Carl

Probst, Manuel

Rich, Dylan

English

Morehead State University

MOREHEAD STATE UNIVERSITY Introduction The Wingate Anaerobic Power Test (AnPT) has been used for decades to measure lower body peak and average anaerobic power, components critical to athletic performance such as in running and cycling events. The test is typically performed on a cycle ergometer with minimal hip rotation in the sagittal plane, as in 11traditional 11 cycling. However, the hips can move in multiple planes and therefore the hip musculature may additionally contribute to overall anaerobic power. Purpose Due to the potential contribution of the hip musculature in generating anaerobic power, the purpose of this study was to determine the effect of increased hip rotation on anaerobic power and fatigue.We hypothesized that increased rotation would have an impact on anaerobic power even if the subject transitions from the traditional Wingate Power Test to the hip swivel Wingate test during all-out cycling while decreasing fatigue index. Methods Subjects. Sixteen (male (10) and female (6)) students, between the ages 19 and 27 from Morehead State University, volunteered for the study instruments. The instruments that were used for the test include: Monark 874E Ergometer, SMI computer program, and scale to gather weight. Procedures: This study required each participating to complete to different test using the Wingate. Subjects performed this test twice on nonconsecutive days in order to ensure full recovery. A counter-balanced design was used to avoid an order effect. If incorrect form was utilized then the test was stopped. Each subject was weighed prior to testing in order to determine the proper resistance (load applied to the bike) added. The load is 7.5% of the subjects weight in kg. Following a seat height adjustment each subject performed a two minute non load bearing warm-up before each portion of the tests. Traditional Cycling: Each subject then performed a 1 0-second, no-load period of increased cycling speed. Once the 10 second countdown was complete, a weight tray with the proper load was dropped, applying tension to the flywheel making the bike harder to pedal. Each subject pedaled all out for 30 seconds against the weighted flywheel, followed by a 2-5 minute no-load, cool down. Rotation Cycling. Subjects were instructed to perform the first 15 seconds like the traditional test, then at 15 seconds were given an indicator to over-rotate their hips by aiming their knees at the handlebar stem of the bike. Subjects were initially allowed to practice this technique during their warm-up period. Technique Pair 1 Pair 2 Pair 3 Pair 4 The Effect of Increased Hip Rotation on Lower Body Anaerobic Power and Fatigue Index During the Wingate Anaerobic Power Test Andrea Foster, Keisha Crum, Luke Humphreys, Dylan Rich Mentors: Dr. Manuel Probst, Dr. Gina Gonzalez, Carl Pickering The Department of Kinesiology, Health and Imaging Sciences College of Science P. dS I T a1re amples est Paired Differences 95% Confidence Interval of the Difference Mean Std. Deviation Std. Error Mean Lower Upper t df Sia. (2~tailed) Peak Traditional-Peak 21.813 63.704 15.926 Swivel Mean Traditional --.625 27.232 6.808 Mean Swivel Min Traditional - Min -6.750 40.151 10.038 Swivel Traditional Fatigue -6.000 5.741 1.435 Swivel FatiQue ' GMONARK -12.133 -15.136 -28.145 2.941 I ' ' 55.758 13.886 14.645 9.059 ::;. Health o meter ,, 1.370 15 .191 -.092 15 .928 -.672 15 .512 4.180 15 .001 \ MOREHEAD STATE UNIVERSITY Methods '" The statistical analysis was a paired samples t-test that was performed on the peak power, minimum power, mean power, and the fatigue index(% decrease in power) of each subject using IBM's SPSS software. Results The results in Table 1 indicate that the mean power for the traditional and rotation Wingate tests are both 475 W (Traditional: 4 75 +1- 171, Rotation:475 +1- 165). The results also display that the fatigue index for the traditional Wingate test was 51% +1- 11%, while the Rotation Wingate test was 45% +I- 11% This is a 6% decrease in fatigue loss. This means that transitioning to the hip rotation technique does not directly cause the over all power to decrease but illustrates a decrease in the fatigue index by approximately 6%. Traditional Std.Deviation Rotation Std. Deviation Peak (W) 668 267 646 Minimum Power(W) 334 133 341 Mean Power (W) 475 171 475 Fatigue Index(%) 51 11 43 Fatigue index on Traditional vs Rotation Wingate Test -55 ~ -;;so QJ -g 45 -~ 40 aD ·_.:::. ~ 35 traditional roatation \Ningate Test Discussion 235 130 165 165 The results from this study indicate that our hypothesis was correct. Participants were able to keep the same mean power while lowering their fatigue index in this study. This gives credibility to our hypothesis. These results could benefit cyclists by incorporating the hip swivel (rotation of the hips) after the cyclist begins to fatigue or during the of the middle of a race therefore they will be less fatigued and in turn exert more power toward the end of the race. Sample Trends for Power (Traditional vs. Hip Rotation • 700,------'---------...__ ___ _L..._ _ ~ 65 0 • • • • • • . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • • . • • • • • • • . . . . . . . . . . . . . . 60 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . · ~ · . . . . . . . . .. . . .. . .. . 55 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . = \,.- ..-· . ~ 500 ::: ~ . : : ~ ~ .::::.:. ~ . ~~~~~:~~: : :..:~:: :~~ :: : : :: : ::::::::::::: . & ·························· · -····· - ...... ... ..... -:'~~~~.:......;...~ 450 ···· ................... ~ .... . . ....... . 4 00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • 35 0 . . . • • • • • • • . • • • • . . . . . . . . . . . . . . . . . . . . . . . . . • . • • • • • • • • . . • • . • • . . . . . . • • • • . . . . . 300':-----------------------J 0 5 10 1 5 20 25 30 Time (s) Hip Swivel • Traditional 

The Effect of Increased Hip Rotation on Lower Body Anaerobic Power and Fatigue Index During the Wingate Anaerobic Power Test

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The Effect of Increased Hip Rotation on Lower Body Anaerobic Power and Fatigue Index During the Wingate Anaerobic Power Test

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