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Muscular Response to Sudden Load: A Tool to Evaluate Fatigue

Sixteen subjects were exposed to fatiguing (vibration) and restorative (walking) interventions to assess their response to sudden loads. Unexpected loads, which people often experience, can lead to high forces in the spine and may be a cause of low irack injury. Erector spinae responses to sudden load were mediated by exposure to vibration and walking. Reaction time was affected by fatigue. Vertical vibration exposure significantly increased the muscle response time. Walking was able to ameliorate that effect. Sudden loads can exacerbate fatigue effects. Walking after driving, reduces the risk to the back due to handling unpredictable loads.