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| Study on grip strength in children aged 5 to 6 years old in Nanjing |
| WANG Jing1, ZHANG Lei1, HONG Qin1, YANG Lei1, JIANG Bei1, XU Qu2, OU Jiaxin2, ZHANG Qingyu2, LI Nan2, TONG Meiling1, GUO Xirong1,2, CHI Xia1,2 |
| 1. Department of Child Health, Obstetrics and Gynecology Hospital affiliated to Nanjing Medical University, Nanjing 210004, Jiangsu Province, China；2. Institute of Pediatrics, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China |
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Abstract Objective To analyze the grip strength of children in order to identify developmental laws and characteristics of grip strength, including gender, age, left or right hand, and hand size. Methods A stratified random sample of 485 children in Nanjing ranging in age from 5 to 6 years participated in the study. The size of hands were measured, and developmental laws and characteristics of grip strength, including gender, age, left or right hand, and hand size, were also analyzed. Results ① Boys appeared to be stronger than girls, the results showed no difference between two hands between boys and girls. Strength of right hands among boys increased by 1.7 to 3.8 pounds (1 pound=0.453 kg) every 6 months while the left increased by 1.7 to 4.5 pounds; strength of right hands among girls increased by 2.3 to 2.5 pounds every 6 months while the left increased by 1.5 to 3.2 pounds. ② The study provided an important referred data of grip strength in Nanjing, data were described as P5, P25, P50, and P75. ③ Strong correlations existed between grip strength and hand size. Conclusion The study analyzed the developmental laws and characteristics of grip strength of children in Nanjing ranging in age from 5 to 6 years according to the age, gender, and hand size, and provided a basis for further clinical and scientific research.
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