Nicklin et al reply

J Nicklin, Y Karni, C. Wiles
1987 Journal of Neurology, Neurosurgery and Psychiatry  
Matters arising of left shoulder abduction. My third concern with the study is that the authors' results differ from those I have obtained and reported elsewhere.4 Although the authors' work is, in many more ways, more comprehensive than my own, the two issues addressed above (correction for gravity and prevention of substitution) were controlled in my paper. The result of my study of knee extension was that relative endurance, which the authors seem also to be testing, was better in patients
more » ... etter in patients than in normal subjects. As the patients were weaker than the normal subjects, I suggested that force production in the patients decreased to some threshold level in less time or in fewer contractions. This, I proposed, was because the patients were closer to the threshold level to start with, not because their rate of decline in force production (Fatigue index) was any greater. Whether the issues I have addressed are truly critical, when using hand-held dynamometers, to test fatigue, awaits verification. In the mean time the authors and other readers of their work may wish to exercise caution in inferring too much from the authors' findings.
doi:10.1136/jnnp.50.11.1563 fatcat:2sd4d67oxfa35ij4zk2uy5gic4