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Updated: Apr 6, 2026

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test
Published on: July 27, 2015
Obesity-related differences in neuromuscular fatigue in adolescent girls
Sebastian Garcia-Vicencio1, Vincent Martin1, Virginie Kluka1
1EA 3533, Laboratory of Metabolic Adaptations During Exercise in Physiological and Pathological Conditions (AME2P), Clermont Auvergne University, Blaise Pascal University, BP 10448, 63000, Clermont-Ferrand, France.
Purpose:
The aim of this study was to investigate the effect of obesity on neuromuscular fatigue in adolescent girls.
Methods:
Twelve lean (13.6 ± 0.8 years) and 12 obese (13.9 ± 0.9 years) girls repeated 5-s maximal voluntary contractions (MVC) of the knee extensors until the generated torque reached 55 % of its initial value. Magnetic stimulations were delivered to the femoral nerve every five MVCs to follow the course of voluntary activation (VA) and potentiated twitch torque (Qtwpot).
Results:
Torque reached 55 % of its initial value after 52.6 ± 20.4 and 74.9 ± 22.8 repetitions in obese and lean girls, respectively (p < 0.01). Furthermore, the decline of VA was smaller in obese girls (p < 0.001). In contrast, Qtwpot decreased to a greater extent in obese girls (p < 0.05).
Conclusions:
Obese girls fatigue faster than their lean counterparts. The peripheral factors mainly account for fatigue in obese girls, whereas central factors are mainly involved in lean girls.
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