Korean J Sports Med.  2024 Sep;42(3):184-192. 10.5763/kjsm.2024.42.3.184.

The Relationship between Obesity Severity, Participation in Muscle Strength Exercise, and Knee Osteoarthritis in Elderly Women: A Cross-Sectional Analysis Study on Korean Data

• Kim M
• Gam H
• Lee I
• Kim Jo
• Oh T

• KMID: 2558666
• DOI: http://doi.org/10.5763/kjsm.2024.42.3.184

Abstract

Purpose
This study aimed to investigate the role of muscle strength exercise in the association between obesity status and knee osteoarthritis (KOA).
Methods
The study subjects were 1,266 elderly women aged 65 years and older who participated in the Korea National Health and Nutrition Examination Survey from 2009 to 2011. Participants were categorized into three groups (normal, single obesity, multi-obesity) based on the presence or absence of obesity and abdominal obesity determined by body mass index and waist circumference. Additionally, they were categorized into two groups based on the presence or absence of muscle strength exercise. Logistic regression used to examine the odds ratios (OR) and 95% confidence intervals (CI) for KOA according to the independent and combined levels of obesity status and participation in strength training.
Results
The multi-obesity group had a significantly higher probability of being exposed to KOA compared to the normal group (OR, 2.489; 95% CI, 1.837−3.372). However, there was no significant difference between the groups with and without participation in muscle strength exercise. We also calculated ORs for KOA exposure according to muscle strength exercise participation by obesity status. The results showed that in the multi-obesity group, the probability of KOA exposure was significantly higher in the group not participating in muscle strength exercise compared to the group participating in muscle strength exercise (OR, 2.998; 95% CI, 1.312−6.853).
Conclusion
This study suggests that regularly participating in muscle strength exercise may play a protective role against the risk of KOA associated with obesity and abdominal obesity.

Keyword

Obesity severity; Muscle strength exercise; Knee osteoarthritis; Elderly women

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