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Area of Science:

  • Gerontology
  • Exercise Physiology
  • Cardiovascular Health

Background:

  • Aging is associated with significant impairments in cardiovascular, autonomic, and immune system functions.
  • The potential of resistance training to counteract these age-related functional declines in older adults remains largely unexplored.

Purpose of the Study:

  • To investigate the effects of a 12-week resistance training program on cardiovascular hemodynamics, autonomic function, and immune responses in older adults.
  • To test the hypothesis that resistance training can attenuate age-associated impairments in these physiological systems.

Main Methods:

  • Sixty-eight older adults were randomized into a resistance training group (n=31) or a control group (n=38).
  • The training group underwent 12 weeks of moderate-intensity resistance exercise (65%-80% of 1 Repetition Maximum) three times per week.
  • Assessments included impedance cardiography, electrocardiogram, sit-to-stand test with SpO2 monitoring, respiratory pressures, and plasma cytokine analysis.

Main Results:

  • The resistance training group showed significant improvements in stroke volume, cardiac output, systemic vascular resistance, end-diastolic volume, early diastolic function, pNN50, and the TRI.
  • Maximal expiratory and inspiratory pressures, functional capacity (1-minute sit-to-stand test), and oxygen saturation were also enhanced.
  • Resistance training led to a decrease in pro-inflammatory cytokines (IL-6, TNF-α) and an increase in anti-inflammatory cytokines (IL-10) and klotho levels.

Conclusions:

  • A 12-week resistance training program effectively improves cardiovascular hemodynamics and autonomic balance in older adults.
  • Resistance exercise also enhances respiratory muscle strength, functional capacity, and modulates the immune response by reducing inflammation.
  • These findings highlight resistance training as a beneficial intervention for mitigating age-related physiological decline in older populations.