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BACK MUSCLE FATIGUE IN
SUBMAXIMAL ERGOMETER ROWING: AN EMG STUDY
P.Arpinar-Avsar 1 , A.R.Soylu 2 , H. Ertan 1 , B. Simsek 1 , F.Korkusuz 3
1. Middle East Technical University, Department of Physical Education and Sports, Ankara
06531, Turkey.
2. Hacettepe University, School of Medicine, Department of Biophysics, Ankara,06100,
Turkey
3. Middle East Technical University, Medical Center, Ankara, 06531, Turkey
ABSTRACT
Objectives: The aim of this study was to determine the muscle fatigue related with the
alterations in EMG parameters during submaximal rowing effort.
Methods: Nine clinically healthy competitive male rowers volunteered in the present study.
Median range for age, body weight and height of subjects were 19 (17-23) yr, 72 (68-91) kg,
176 (171-183) cm, respectively. All subjects were asked to maintain stroke rate at 20 rpm and
200 W workload during 20 minute submaximal rowing test on rowing ergometer and surface
EMG signals were recorded from the erector spinae at L2-L4 level on the right and left side.
To determine the muscle fatigue, median frequency (MF) and root mean square (rms-EMG)
were analysed at different time points. Repeated measures ANOVA were used to examine the
effects of fatigue on the rms-EMG and MF. The significance level was set at α