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KINEMATIC AND KINETIC CHARACTERISTICS DURING CMJ’S WITHIN NCAA DIVISION-I FOOTBALL ATHLETES PREPARING FOR SCOUTING COMBINES
Norwood, Samuel
Norwood, Samuel
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Abstract
Literature has examined the positional differences among American football athletes, regarding strength, speed, and power. However, limited information is available regarding asymmetries within the collegiate football population. PURPOSE: The aim of this study is to examine lower-body neuromuscular differences between position via analysis of countermovement jump (CMJ) performance and asymmetries. METHODS: Eleven NCAA Division-I athletes participated in this study (mean±SD; age= 23.6±0.9; Linemen; n=6, height= 194.31±1.53 cm; weight= 130.09±11.51 kg, Mids; n=5, height= 188.98±5.702 cm; weight= 105.6±9.22 kg). Lower-body neuromuscular performance was observed across two training sessions during a scouting combine preparation training cycle. Absolute and relative CMJ metrics were assessed from the braking and propulsive phase. CMJ data was collected at 1000 Hz by using a dual-force plate system. Descriptive statistics were performed on all variables, including the mean and standard deviations for variables of interest, and an independent samples t-test was conducted to measure differences between groups. Statistical significance was set a priori to p < 0.05 for all analyses. RESULTS: Significant differences were observed between groups in CMJ for measures of interest (i.e., jump height, jump momentum, countermovement depth, average braking force, average propulsive force, and braking rate of force development) (p = 0.001- 0.033). Mean differences were observed in average braking force, average propulsive force, and average braking rate of force development in the left lower extremity within the Linemen group. CONCLUSION: Findings from this observational study suggest that asymmetries exist within physically fit, athletic populations. These findings bridge the gap within the literature related to health, wellness, and elite athletic performance.
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This is the poster from a presentation given at the American College of Sport Medicine held in Tulsa, OK on 2/28/2026.
Date
2026-02-28
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University of Kansas
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This item contains archived web content.
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NorwoodS_2026.pdf
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Keywords
Countermovement Jump, Asymmetries, Athletic Performance