Question

An EMG was recorded in a 28-year-old female soccer player. After establishing a baseline EMG activity of the quadriceps during a squatting activity, the patient performs 3 sets of 10 repetitions. During the last set, the patient shows quadriceps fatigue and data shows a gradual increase in EMG signal. What is the MOST likely contributor to this increase in EMG signal?

A. Increase in force production
B. Decrease in force production
C. Increase in fatigue
D. Decrease in gluteal firing

Answer 1

The most likely contributor to the increase in EMG signal during the last set of squats is an increase in fatigue. Muscle fatigue occurs when a muscle can no longer contract in response to signals from the nervous system.

Step-by-step explanation:

The most likely contributor to the increase in EMG signal during the last set of squats is an increase in fatigue. Muscle fatigue occurs when a muscle can no longer contract in response to signals from the nervous system. Factors such as reduced ATP reserves, lactic acid buildup, and imbalances in ion levels can all contribute to muscle fatigue and a decrease in force production.