Exercise test in women and men aged 75-77 years

Area of Science:

• Gerontology
• Exercise Physiology
• Cardiovascular Health

Background:

• Aging is associated with physiological changes impacting exercise capacity.
• Understanding these changes in older adults is crucial for maintaining functional independence.

Purpose of the Study:

• To investigate the physiological responses to an exercise test in 75- to 77-year-old men and women.
• To compare exercise capacity and responses between sexes in this age group.

Main Methods:

• A representative sample of 1,245 individuals aged 70 was followed, with 335 participants (174 women, 161 men) aged 75-77 undergoing an exercise test.
• Participants were excluded due to morbidity (28%), refusal (20%), or missing data (0.5%).
• Maximal and submaximal workloads, heart rate, and blood pressure were measured during a bicycle ergometer test.

Main Results:

• Maximal heart rate averaged around 140 beats/min.
• Females exhibited higher heart rates at submaximal workloads and a greater increase in systolic blood pressure at moderate workloads (30-75 W) compared to males.
• Average maximal work loads were 48 W for women and 66 W for men; 44% of women and 22% of men had capacity potentially interfering with daily activities.

Conclusions:

• Significant sex-based differences exist in physiological responses to exercise in older adults.
• A considerable proportion of individuals aged 75-77 demonstrate reduced physical working capacity, highlighting potential functional limitations.