[Endurable grip strength of office workers classified by job and age (author's transl)]

The authors have measured the power and endurable grip strength by five times repetition at five second intervals on post-office clerks (indoor service and outdoor service) and the personnel of harbor construction office (office workers and crew of dredger). The results are as follows: 1) Grip strength (power: higher value either at the first or the second grip) has negative correlation with age. 2) Endurable grip strength (endurance: subtract lower value either at the fourth or fifth grip from the grip strength) of the indoor mail clerks and office workers has no correlation with age, but that of the others (the outdoor service and crew of dredger) has negative correlation with age.