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Related Concept Videos

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The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
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Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
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Updated: Sep 18, 2025

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
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How Select Strength and Power Measures Relate to FCS Football On-Field Performance.

Seth Long1, Nanette V Lopez1, Jay T Sutliffe1

  • 1Health Sciences Department, Northern Arizona University, Flagstaff, AZ 86011, USA.

Journal of Functional Morphology and Kinesiology
|June 26, 2025
PubMed
Summary
This summary is machine-generated.

This study found limited correlation between collegiate American football players' strength and power metrics and their on-field starting status or contributing plays. Future research should explore other performance factors like football IQ and psychological resilience.

Keywords:
American footballathletecompetitionplaymakerrecruitsport

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Area of Science:

  • Sports Science
  • Biomechanics
  • Athletic Performance Analysis

Background:

  • Understanding the relationship between physical attributes and on-field performance is crucial for American football coaching decisions.
  • Strength and power are key physical components in American football, but their specific impact on collegiate player performance requires further investigation.

Purpose of the Study:

  • To determine the role of baseline and in-season strength and power metrics in predicting on-field performance in collegiate American football players.
  • To examine the correlation between strength/power outcomes and starting status (STR) and contributing plays (CP).

Main Methods:

  • A 9-week in-season analysis of countermovement jump (CMJ) power was conducted weekly.
  • Baseline strength and power were assessed using vertical jump, pull-ups, bench press (one rep max), and power clean.
  • Pearson's correlation and linear regressions were used to analyze relationships between physical metrics and performance indicators (STR, CP).

Main Results:

  • Moderate correlations (r > 0.5) were found between baseline strength/power measures and weekly CMJ performance.
  • Baseline power clean showed a correlation with contributing plays (CP) in week 4 only.
  • No significant relationships were identified between baseline strength/power measures and starting status (STR) or overall CP.

Conclusions:

  • The study's on-field performance variables (STR, CP) did not show significant correlations with the measured strength and power metrics.
  • Future research should incorporate additional performance factors, such as football IQ, recruiting status, and psychological resilience, alongside physical metrics.