Determination of the optimal braking force (Fopt in the Wingate Anaerobic Test (WAnT) among healthy people has been determined based on total body mass. The abnormal muscle mass to total body mass ratio in individuals with neuromuscular disabilities invalidates this approach. This study was intended to validate the optimal force obtained from the Force Velocity Test(FVT) and from an estimate of lean arm volume as two alternative predictors for the Fopt. Twenty-eight 6- to 16-yr-old girls and boys with neuromuscular diseases performed the arm WAnT six times (three trials in each of two visits) against various braking forces to directly determine Fopt. They also performed the arm Force Velocity Test to assess optimal force (FoptFVT). Lean arm volume was determined by anthropometry (ALV) and water displacement (WLV). Correlations between Fopt on the one hand, and FoptFVT, WLV, and ALV on the other, were: R2 = 0.91, 0.81, and 0.82, respectively. Total body mass was the worst predictor (R2 = 0.65). Thus, Fopt obtained from either FVT or lean arm volume estimate is a useful predictor of the Fopt for mean power of the WAnT in children and adolescents with a neuromuscular disability.
Children's Exercise and Nutrition Centre, McMaster University, Hamilton, Ontario, L8N 3Z5, CANADA
Submitted for publication March 1994. [acpt]January 1996
We gratefully acknowledge the help of the team members of the Children's Exercise and Nutrition Centre and wish to express our special gratitude to the most valuable participants of this study: our subjects.
Address for correspondence and reprint requests: Oded Bar-Or, Children's Exercise and Nutrition Centre, McMaster University, Chedoke Hospital Division, Evel Building, Sanatorium Road, Hamilton, Ontario L8N 3Z5, Canada