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Detecting Submaximal Effort in Power Grip by Observation of the Strength Distribution Pattern

From the Department of Traumatology, Hand, Plastic and Reconstructive Surgery, University of Ulm, Germany and the Department of Hand, Plastic and Microsurgery, Karl-Olga Hospital, Stuttgart, Germany

Correspondence: Dr Joachim Gülke, University of Ulm, Ulm, Germany. E-mail:joachim.guelke{at}medizin.uni-ulm.de

This study examined patterns of grip strength when maximal and submaximal effort are applied. Using a sensor glove, 50 healthy subjects performed two different power grips. Both maximal and submaximal gripping showed characteristic patterns of strength distribution that were independent of the degree of power applied. Significant differences were also noted in the strength distribution patterns, depending on whether the grip was performed at maximal, or submaximal, strength. The small finger plays a decisive role in this. In maximal strength gripping, the total measured strength is distributed relatively evenly over all four fingers, with each finger contributing between 23% and 27% of the total strength. In submaximal strength gripping, the little finger is involved very little and only contributes between 14% and 15% of the total strength, with the remainder of the gripping distributed relatively evenly between the index, middle and ring fingers, each of which contributes between 26% and 32% of the total.

Key Words: grip strength • hand • sensor glove • sincerity of effort

Journal of Hand Surgery (European Volume), Vol. 32, No. 6, 677-683 (2007)
DOI: 10.1016/J.JHSE.2007.05.020


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