Hepping Ann M, Ploegmakers Joris J W, Geertzen Jan H B, Bulstra Sjoerd K, Stevens Martin
Department of Rehabilitation Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
PLoS One. 2015 Nov 23;10(11):e0143476. doi: 10.1371/journal.pone.0143476. eCollection 2015.
In adults the preferred hand is often considered to be around 10% stronger than the non-preferred hand. Whether the same is true for children and adolescents remains unclear. The objective of this study is therefore to determine whether there is a difference in grip strength between the preferred and non-preferred hand in developing children, to establish whether this difference is similar for children of a different gender or hand preference, and whether there is a difference in grip strength of the preferred hand of left-preferent (LP) and right-preferent (RP) children.
Cross-sectional study.
Participants were recruited from schools in the northern provinces of the Netherlands. The study included healthy children and adolescents in the age range of 4-17 years.
Each child was allowed a total of four attempts using the JAMAR hand dynamometer, two attempts with each hand. All individual attempts were scored. Hand preference was determined by asking which hand was used to write, or in the case of 4- and 5-year-olds, which hand was used to draw a shape.
The study population comprised 2284 children and adolescents. RP boys and girls scored significantly higher with their preferred hand, the difference amounting to 9.5 and 10.1% respectively. LP girls scored significantly higher with their preferred hand, but this difference was only 3.0%. For LP boys no significant difference was found in favor of either hand. LP children score higher with the non-preferred hand and tie scores on both hands more often than RP children.
The 10% rule of hand preference is applicable to RP children ranging in age between 4 and 17 years, but not to LP children. In contrast to LP boys, LP girls are generally significantly stronger with their preferred hand.
在成年人中，优势手通常被认为比非优势手强壮约10%。儿童和青少年是否也是如此仍不清楚。因此，本研究的目的是确定发育中的儿童优势手和非优势手的握力是否存在差异，确定这种差异对于不同性别或手偏好的儿童是否相似，以及左利手（LP）和右利手（RP）儿童优势手的握力是否存在差异。
横断面研究。
参与者从荷兰北部省份的学校招募。该研究包括4至17岁的健康儿童和青少年。
每个孩子使用JAMAR握力计总共进行四次尝试，每只手各两次。记录所有个人尝试的得分。通过询问孩子用哪只手写字来确定手偏好，对于4岁和5岁的孩子，则询问用哪只手画形状。
研究人群包括2284名儿童和青少年。右利手男孩和女孩的优势手握力得分显著更高，差异分别为9.5%和10.1%。左利手女孩的优势手握力得分显著更高，但差异仅为3.0%。对于左利手男孩，未发现哪只手有显著优势。与右利手儿童相比，左利手儿童用非优势手握力得分更高，且双手得分相同的情况更常见。
手偏好的10%规则适用于4至17岁的右利手儿童，但不适用于左利手儿童。与左利手男孩不同，左利手女孩的优势手通常明显更强壮。
