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Selecting Metrics that matter (CMJ) - Article Review
This article by Bishop et al. discusses the use of the countermovement jump (CMJ) test in strength and conditioning, focusing on its applications for performance profiling, neuromuscular fatigue monitoring, and injury rehabilitation testing. The CMJ is widely used due to its simplicity, time efficiency, and relevance to many sports.
Key points from the article include:
Performance Profiling:
CMJ metrics like jump height, peak force, and peak power show strong associations with strength, linear speed, and change of direction ability.
These relationships justify the use of CMJ as a proxy for athletic performance in various sports.
Neuromuscular Fatigue Monitoring:
Time-based metrics such as relative net impulse, flight time, time to peak power, and flight time:contraction time ratio are more sensitive to fatigue than traditional metrics like jump height or peak power.
Athletes may adjust their jump strategy to maintain height and force production when fatigued, making time-based metrics crucial for detecting fatigue.
Injury Rehabilitation:
While not extensively covered in the summary, the article mentions that CMJ is commonly used in injury-based research as part of test batteries for rehabilitation.
Application for Sport Performance:
Test Selection: Coaches and practitioners should choose CMJ metrics based on their specific goals (performance profiling, fatigue monitoring, or injury rehabilitation).
Performance Tracking: Use CMJ metrics like jump height, peak force, and peak power to monitor overall athletic performance and strength levels.
Fatigue Management: Implement time-based CMJ metrics to detect neuromuscular fatigue, allowing for better management of training loads and recovery strategies.
Rehabilitation Progress: Incorporate CMJ testing in return-to-play protocols to assess an athlete's readiness and track rehabilitation progress.
Individualized Approach: Consider linking multiple CMJ metrics together for a more comprehensive understanding of an athlete's performance and fatigue status.
By understanding the appropriate use of CMJ metrics for different purposes, coaches and practitioners can enhance their athlete monitoring and decision-making processes, ultimately improving sport performance and reducing injury risk.
Article PDF Below:
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