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Safety and Feasibility of 1-Repetition Maximum (1-RM) Testing in Children and Adolescents With Bilateral Spastic
Mattie Pontiff1, Noelle G Moreau
1Departments of Cell Biology and Anatomy (Dr Pontiff) and Physical Therapy (Drs Pontiff and Moreau), LSU Health Sciences Center, New Orleans, Louisiana.
Purpose:
The purpose of this study was to standardize 1-repetition maximum (1-RM) testing procedures and evaluate the safety and feasibility of these procedures in youth with cerebral palsy (CP).
Methods:
Youth with CP completed 1-RM testing on a leg press.
Results:
Mean absolute, adjusted, and normalized 1-RM loads were 262.4 ± 161.3 lb, 127.0 ± 80.2 lb, and 1.28 ± 0.51, respectively, and 67% were able to successfully lift the same or heavier load after a single failure. Cessation of testing after 1 failed attempt resulted in a 19.0% underestimation of the 1-RM.
Conclusions:
1-RM testing in youth with CP is safe and feasible. Multiple attempts at a failed load should be provided to prevent underestimation in strength. The 1-RM test provides a more accurate strength assessment, which will improve the dosing for resistance training in youth with CP.
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