Physiological aging of champion runners

Area of Science:

• Exercise physiology
• Sports science
• Aging research

Background:

• Long-term physiological effects of elite athletic careers on aging are not fully understood.
• Understanding how former endurance athletes adapt to aging provides insights into cardiovascular health and performance.
• This study investigates the physiological status of former champion middle-distance runners decades after their competitive careers.

Purpose of the Study:

• To determine the physiological adjustments to aerobic and maximal exercise in former champion middle-distance runners.
• To compare their physiological responses with age-matched non-athletes.
• To assess the long-term impact of elite endurance training on aging physiology.

Main Methods:

• Physiological assessments including resting state, aerobic walk (5.6 km/h, 9% grade), and exhausting treadmill work were conducted in 1971.
• Measurements included blood lactates, ventilatory equivalents, heart rates, and maximal oxygen uptake (VO2max).
• Participants were former champion middle-distance runners (ages 47-68) and age-matched non-athletes.

Main Results:

• Former athletes showed similar resting physiology to non-athletes but experienced less physiological strain during aerobic walking.
• Mean VO2max declined with age in both groups, but former runners' VO2max remained above the average of non-athletic men.
• Maximal heart rate also declined with age in both groups, with ventilatory responses correlating with blood lactate levels.

Conclusions:

• Elite middle-distance runners maintain superior physiological capacity compared to non-athletes even decades after retirement.
• Aging leads to a decline in VO2max and maximal heart rate in both athletes and non-athletes.
• Endurance training may confer long-term benefits on physiological resilience during aging.