Heritability estimates of muscle strength-related phenotypes: A systematic review and meta-analysis

H. Zempo, E. Miyamoto-Mikami, N. Kikuchi, N. Fuku, M. Miyachi, H. Murakami

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The purpose of this study was to clarify the heritability estimates of human muscle strength-related phenotypes (H2-msp). A systematic literature search was conducted using PubMed (through August 22, 2016). Studies reporting the H2-msp for healthy subjects in a sedentary state were included. Random-effects models were used to calculate the weighted mean heritability estimates. Moreover, subgroup analyses were performed based on phenotypic categories (eg, grip strength, isotonic strength, jumping ability). Sensitivity analyses were also conducted to investigate potential sources of heterogeneity of H2-msp, which included age and sex. Twenty-four articles including 58 measurements were included in the meta-analysis. The weighted mean H2-msp for all 58 measurements was 0.52 (95% confidence intervals [CI]: 0.48–0.56), with high heterogeneity (I2=91.0%, P<.001). Subgroup analysis showed that the heritability of isometric grip strength, other isometric strength, isotonic strength, isokinetic strength, jumping ability, and other power measurements was 0.56 (95% CI: 0.46–0.67), 0.49 (0.47–0.52), 0.49 (0.32–0.67), 0.49 (0.37–0.61), 0.55 (0.45–0.65), and 0.51 (0.31–0.70), respectively. The H2-msp decreased with age (P<.05). In conclusion, our results indicate that the influence of genetic and environmental factors on muscle strength-related phenotypes is comparable. Moreover, the role of environmental factors increased with age. These findings may contribute toward an understanding of muscle strength-related phenotypes.

Original languageEnglish
Pages (from-to)1537-1546
Number of pages10
JournalScandinavian Journal of Medicine and Science in Sports
Volume27
Issue number12
DOIs
Publication statusPublished - 2017 Dec
Externally publishedYes

Keywords

  • genetic factors
  • heredity
  • meta-analysis
  • muscle strength
  • systematic review

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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