RELATIONSHIPS BETWEEN RELATIVE BODY STRENGTH AND COUNTERMOVEMENT JUMP KINETICS IN NCAA DIVISION III STUDENT-ATHLETES
J. Sedy, G. Jackson, K. Alvarenga-Beech, C. Reyes
Linfield University, McMinnville, OR
Many tests are used to measure and evaluate athleticism and neuromuscular characteristics. But practice, training, and budgetary constraints can limit how many tests can be executed for quantifying performance. Therefore, many professionals must be selective in the technology and assessments chosen, for the sake of efficiency and effectiveness. PURPOSE: the purpose of this study was to compare the relationships between relative body strength (RBS), as measured during the Isometric mid-thigh pull (IMTP), and kinetic variables of the countermovement jump (CMJ). METHODS: Student-athletes from a variety of NCAA Division III athletic teams were utilized in this study (N = 93: 45 males and 48 females). All were considered healthy and full participants of their respective team training sessions. All participants reported to the lab for one, 30-minute testing session. Following a standardized warm-up, RBS was measured utilizing the IMTP. Their peak pulling force across three trials was divided by their current body weight to make their score relative. Their no-arm countermovement jump was recorded on a force plate and these kinetic metrics were collected: jump height (JH), Countermovement Depth (CD), Average Relative Propulsive Force (APF), Peak Relative Propulsive Force (PPF), Positive Net Impulse (NI), and Reactive Strength Index – Modified (mRSI). Linear regressions were used to analyze the relationships between the predictor variable (RBS) across the CMJ metrics. RESULTS: Significant relationships were calculated between RBS and all CMJ metrics (R2 = 0.178 - 0.403; p < 0.001). CONCLUSIONS: Utilizing a simple isometric test to quantify RBS has predictive qualities to the kinetics of a CMJ. Therefore, professionals can utilize either test to indirectly estimate the performance of the other, which can cut down on costs, time, and energy of having to conduct several assessments in a training/testing environment.
Sedy, J; Jackson, G; Alvarenga-Beech, K; and Reyes, C
"RELATIONSHIPS BETWEEN RELATIVE BODY STRENGTH AND COUNTERMOVEMENT JUMP KINETICS IN NCAA DIVISION III STUDENT-ATHLETES,"
International Journal of Exercise Science: Conference Proceedings: Vol. 8:
10, Article 52.
Available at: https://digitalcommons.wku.edu/ijesab/vol8/iss10/52