Ann Rehabil Med.  2018 Dec;42(6):822-832. 10.5535/arm.2018.42.6.822.

Sleep Quality and Attention May Correlate With Hand Grip Strength: FARM Study

• Lee G
• Baek S
• Park HW
• Kang EK

• KMID: 2448903
• DOI: http://doi.org/10.5535/arm.2018.42.6.822

Abstract

OBJECTIVE
To determine the socio-demographic, psychologic, hematologic, or other relevant factors associated with hand grip strength in Korean farmers.
METHODS
A total of 528 healthy Korean farmers were enrolled. Hand grip strength was measured in both hands using a hydraulic dynamometer. Socio-demographic characteristics were assessed and anthropometric measurements were obtained. Psycho-cognitive measurements such as sleep quality (Pittsburgh Sleep Quality Index) and Go/No-Go test response time were conducted. In addition to physical measurements, serologic parameters including insulin-like growth factor 1 were measured. The factors associated with hand grip strength were analyzed using multiple linear regression analysis after adjusting for age, height, and weight.
RESULTS
The mean hand grip strength was associated with the Pittsburgh Sleep Quality Index total score (β=-0.12, p=0.01), the Go/No-Go test response time (β=-0.18, p=0.001), vitamin D (β=0.12, p=0.02), and insulin-like growth factor 1 levels (β=0.1, p=0.045). In female farmers, hand grip strength was only associated with the Pittsburgh Sleep Quality Index total score (β=-0.32, p < 0.001).
CONCLUSION
The results of this study demonstrate that hand grip strength was associated with sleep quality and attention in Korean farmers.

Keyword

Hand strength; Sleep; Attention; Insulin-like growth factor I; Farmers

MeSH Terms

Agriculture*
Farmers
Female
Hand Strength*
Hand*
Humans
Insulin-Like Growth Factor I
Linear Models
Reaction Time
Vitamin D
Insulin-Like Growth Factor I
Vitamin D

Figure

• 

  Fig. 1. Flow chart outlining participant selection/inclusion.

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