One-Year Handgrip Strength Change in Kindergarteners Depends upon Physical Activity Status

Author:

Abe Akemi1,Sanui Rika2,Loenneke Jeremy P.3,Abe Takashi14ORCID

Affiliation:

1. Division of Children’s Health and Exercise Research, Institute of Trainology, Fukuoka 814-0001, Japan

2. Child Health Research Group, Atagohama Kindergarten, Fukuoka 819-0002, Japan

3. Department of Health, Exercise Science, & Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, Oxford, MS 38677, USA

4. Institute of Health and Sports Science & Medicine, Graduate School of Health and Sports Science, Juntendo University, Inzai 270-1695, Japan

Abstract

Free play in kindergarten can be roughly divided into fine and gross motor activities, but the effects of these activities on improving handgrip strength are unknown. Therefore, we aimed to compare one-year changes in handgrip strength and forearm flexor muscle size in children separated by preferred play in a kindergarten. One hundred and eleven children were recruited from a local kindergarten. They underwent handgrip strength and forearm muscle thickness measurements, and 95 (49 boys and 46 girls) underwent a second measurement one year after the first measurement. Class teachers assessed the physical activity of everyone in their class after the second measurement. Using three evaluation scores by the class teachers, we divided children into three groups based on the children’s preference to play in kindergarten (fine movement vs. gross motor movement). Handgrip strength did not change differently between groups across one year. However, children who liked active playing outside (i.e., gross motor activity) were stronger than others. Furthermore, children who like playing outside observed greater changes than the other groups in the ulna (right hand) and radius muscle thickness (left hand), suggesting that changes in forearm muscle size might be incongruent with changes in handgrip strength among the three activity groups.

Funder

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research

Publisher

MDPI AG

Subject

Paleontology,Space and Planetary Science,General Biochemistry, Genetics and Molecular Biology,Ecology, Evolution, Behavior and Systematics

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