A simple on-field fast knee-flexion test to assess acute knee flexor fatigue.

ABSTRACT:

Purpose

In a practical setting, outside the laboratory, acute muscle fatigue may be underestimated because substantial recovery occurs during the elapsed time between the end of exercise and fatigue assessment. We introduce a simple field test to assess knee flexor contractile function quickly after exercise cessation.

Methods

Fourteen young amateur football players performed maximally fast knee flexions (FKFs) in the prone position with their dominant leg, before (pre) and 20 s after finishing a series of fourteen fatiguing 40 m sprints (post) and again following 6 min recovery (rec). Peak angular acceleration (PAA) about the knee joint was measured with a small inertial measurement unit (IMU) firmly attached to the shin.

Results

Although participants only practiced

SUBMITTER: de Ruiter CJ 

PROVIDER: S-EPMC12227368 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature