Objective To investigate grip strength and grip strength index in children aged 6~9 in Guangzhou,and to provide reference for clinical assessment. Method A total of 474 children aged 6~9 were recruited in Guangzhou from January to December,2016.Hand grip strength was measured using Jamar dynamometer with standard test posture.Weight was determined and grip strength index was calculated. Results The values of hand grip strength of right (left) hand in boys aged 6~9 were 8.5±1.9 (7.9±1.7),10.3±2.3 (9.5±2.0),11.6±3.0 (11.0±2.8) and 13.2±2.8 (12.3±2.5)kg,respectively,while 7.7±2.0 (7.3±2.0),8.9±1.7 (8.3±1.6),10.7±2.5 (9.8±2.3),11.4±2.7 (10.2±2.2) kg for girls aged 6~9,respectively.For hand grip strength index,the mean values of right (left) hand were 38.9±7.5 (36.1±7.3),42.3±8.0 (39.1±7.7),41.2±8.7 (38.7±7.9),41.0±10.0(38.5±9.6) for boys and 36.6±8.3 (35.2±8.8),38.7±6.3(36.1±6.5),40.3±8.0 (37.0±7.7),41.6±9.0 (37.4±7.6) for girls,respectively.Both hand grip strength and hand grip strength index were significantly higher in boys than those of girls in each age strata (P<0.05).With increasing age,the hand grip strength of either side increased significantly regardless of gender (P<0.001).For hand grip strength index,no significant differences among different age groups were observed except for the right hands of girls. Conclusion The data provide reference for evaluating grip strength and grip strength index in children aged 6~9 in Guangzhou.
Key words
hand grip strength /
grip strength index /
children
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