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Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test
Published on: July 27, 2015
A feasible and reliable muscle fatigue assessment protocol for individuals with cerebral palsy
Noelle Moreau1, Li Li, Diane L Damiano
1Department of Kinesiology, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Purpose:
To develop a reliable and feasible isokinetic fatigue protocol for the knee flexors and extensors in individuals with cerebral palsy (CP) who are ambulatory.
Methods:
Twelve subjects with CP, 10 to 23 years old, participated in the study. The protocol consisted of repeated maximum voluntary concentric knee flexion and extensions at 60 degrees /sec for a minimum of 35 repetitions. Fatigue Index (FI) and slope of the linear regression were computed. Reliability tests conducted a week later with five of the 12 subjects. Intraclass correlation coefficients were calculated for test-retest reliability.
Results:
All subjects completed 35 repetitions, with only half reaching a 50% decline. All fatigue parameters were reliable for both knee flexors and extensors (slope: 0.94 and 0.97; slope/peak torque: 0.83 and 0.99; FI: 0.73 and 0.86, respectively).
Conclusions:
This isokinetic fatigue protocol is reliable and feasible for children and young adults with mild to moderate CP.
