HAND MUSCLE STRENGTH AND HAND DEXTERITY AFTER EXPOSURE TO HAND AND ARM FROM GRINDER VIBRATION AMONG GRINDING WORKERS

摘要: This research was a quasi-experimental study designed for thirty female workers performing grinding operation with another other as the control group. Hand muscle strength measured by assessing hand grip (HGS) and pinch (PS) while dexterity maximum tapping ability in 10 seconds (MTA). The participants were asked to perform tests at (1) initial time 08.00 a.m., (2) before morning rest break 10.00 (3) after 10.10 (4) lunch 12.00 (5) 13.00 p.m., (6) afternoon 15.00 (7) 15.10 p.m. (8) end of work 17.00 p.m.. In contrast, group only (08.00 a.m.). result showed that HGS, PS MTA dominant generally stronger than those non-dominant (p-value 0.05). Percent changes (%) from MTA, HGS right left hands all intervals lower except each interval not different time. These confirmed dexterity. shows exposed vibration process, they affected decreased maximal ability. However, able recover taking break. Furthermore, there reduced (17.00 p.m.), so may be an accumulation tissue damage fatigue muscles arm continuous grinding. could influence can used considering appropriate duration reducing possible muscular workers. Journal Sports Science Technology 2012 ;12(1)11 - 32)