Gender-related differences in physical performance among seniors

Area of Science:

• Gerontology
• Kinesiology
• Biomedical Engineering

Background:

• Physical performance declines with age, impacting seniors' independence.
• Understanding gender-specific differences in physical performance is crucial for targeted interventions.
• Balance, gait, and muscle strength are key indicators of functional ability in older adults.

Purpose of the Study:

• To investigate gender disparities in balance, gait, and muscle performance among healthy seniors.
• To identify gender-specific factors influencing physical performance in older adults.
• To explore the relationship between strength, activity level, and body composition across genders.

Main Methods:

• Recruited 40 healthy community-dwelling seniors (20 men, 20 women, aged 74.5 +/- 5.3 years).
• Assessed limits of stability, gait speed, and lower limb isokinetic strength (flexors/extensors).
• Measured self-reported physical activity levels and balance confidence.

Main Results:

• No significant gender differences were found in gait speed, normalized limits of stability, activity level, or balance confidence.
• Women exhibited significantly lower lower limb muscle strength than men (p = .007), even after controlling for weight and BMI.
• Gender explained 18-46% of the variance in strength, modifying the activity-strength relationship. Activity level was key for men's strength, while body weight was key for women's.

Conclusions:

• While balance and gait are similar, women seniors demonstrate reduced muscle strength compared to men.
• Gender-specific factors, including body weight (women) and activity level (men), significantly influence muscle strength.
• These findings highlight the need for gender-tailored strategies to maintain physical function and strength in aging populations.