Abstract
The length and the shape of chopsticks would seem to have closer relation to their functional manipulation.
In this study, in order to determine the suitable length of chopsticks for use, soybeans and pieces of “Tofu” were picked up with various lengths of chopsticks for a definite time, and then numbers of objects picked up were counted and the electromyograms of finger were drawn.
Maximum numbers of the objects were picked up with a suitable length of chopsticks and minimum contraction level of the muscle was observed at the same length. The most efficient length for picking up seemed to be about 17-21 cm and 1.1-1.2 times as long as the size of the subject's hand.
