Masters Athletes: Performance and Physiological Considerations
Masters Athletes: Defining and Exemplifying
In the previous lecture, we covered key physiological changes associated with aging, emphasizing the significant differences between trained and untrained individuals. A crucial point was the importance of maintaining training, especially intensity, throughout life to mitigate age-related physiological decline.
Examples of Masters Athletes
Jacinta Bonilla: An 80-year-old CrossFitter who celebrated his birthday by performing 80 push-ups, pull-ups, kettlebell swings, and deadlifts.
Susan Clark: A 61-year-old masters CrossFit champion with an impressive physique.
Ronald Johnson: Won eight medals and set eight records, running 100 meters in 90 seconds in the men's over-85 category in New Zealand.
These examples highlight how maintaining exercise and specific training can preserve functionality and performance into advanced age.
Performance Comparisons: Then and Now
Comparing the winning times from the first Olympic Games in Athens (1896) with current age group records reveals that modern masters athletes often surpass those original Olympic achievements. This illustrates the potential for enhanced capabilities with age through consistent training.
Importance of Studying Masters Athletes
Studying masters athletes provides insight into how exercise and training can offset physiological decline. It also demonstrates how lifestyle choices (sedentary vs. active) can significantly impact the aging process.
Increasing Participation of Masters Athletes
There's a growing number of masters athletes. Recent marathons show that 40-50% of finishers are over 40. In World Ironman World Championships, 75-80% of competitors are over 35, with 35-50% classified as older masters (over 50). This indicates a significant uptake in exercise to maintain physiological function.
Set Point Theory: Lifespan vs. Health Span
The set point theory helps to understand the relationship between lifespan, health span, and morbidity risk:
Sedentary Behavior: Interacts negatively with health, leading to a compromised health status.
Sufficient Physical Activity: Counteracts negative effects, optimizing health span and outcomes.
High Physical Activity Levels: Enhances physiology and function, optimizing both health span and performance.
Highly trained individuals possess physiological advantages that can offset the negative impacts of inactivity on body composition and disease risk. The amount of exercise needed to mitigate the effects of inactivity is crucial, especially for masters athletes.
Performance Decline with Age
Analysis of world record performances by masters athletes shows a linear decline with age until around the eighth decade (70-80 years), where the decline becomes more accelerated. This occurs across both short and long distance events.
Decline in Short vs. Long Distance Events
The decline in performance varies between short and long distance events. Shorter, sprint-based performances tend to decline faster than endurance-based performances. This is partly due to changes in muscle fiber composition, with an increased proportion of slow twitch fibers that favor endurance.
Impact of Cardiovascular and Respiratory System Changes
In the eighth decade, accelerated declines are often driven by significant changes in the cardiovascular and respiratory systems, leading to a decline in VO_2 max and subsequent performance reduction.
Influence of Exercise Modality and Sex Differences
Besides aging, subtle differences in performance exist between different exercise modalities and between sexes (female vs. male).
Swimming Performance
Swimming offers advantages for studying aging effects:
Non-weight-bearing activity
Horizontal body position
Low incidence of injury
Swimming performance tends to be more similar between males and females compared to running, where males may outperform females at any given distance.
Running Performance
Running carries a higher risk of injury, which can disrupt training and affect performance.
Sex-Specific Advantages in Swimming
Women may have unique advantages in swimming due to their body composition:
Smaller body size, resulting in less drag.
Lower body density, providing greater buoyancy.
Greater fat mass and shorter legs, promoting a more horizontal and streamlined position.
Greater capacity to conserve energy during longer events.
These factors can offset the limitations women face in running due to changes in muscle mass and cardiovascular function.
Ultra-Endurance Swimming
Interestingly, women might excel in ultra-endurance swimming events. In recent triathlon championships, sex differences in swimming performance were only 1%, compared to 10% in running and cycling. The record for the fastest English Channel swim has been held by a woman for many years, and the Guinness World Record for the longest nonstop ocean swim is held by an Australian female who swam 96 kilometers in 38 hours and 33 minutes.
Training Considerations for Masters Athletes
While masters athletes can maintain performance and endurance through regular training, especially before the 80th decade, it's crucial to consider training strategies that address physiological changes.
Training Intensity and Volume
Maintaining training intensity and volume is a critical factor in preserving performance and health in masters athletes. Specificity of training is essential, and the behavioral effect of training slows down the rate of physiological decline.
Factors Affecting Performance Decline
Injury: Accelerates performance decline.
Modality: Impacts performance differently based on the exercise type.
Sex: Influences performance changes in different exercise modalities.
Maintaining VO_2 Max
VO2 max can be maintained during middle age for up to 10 years in vigorously training individuals. Declines in VO2 max during middle age are often linked to behavioral factors, such as reduced training intensity.
Challenges Faced by Masters Athletes
Increased job and family responsibilities, reducing time and energy for training.
Higher risk of injury.
Reduced motivation.
Shifting goals from competition to personal records.
Goal Setting and Motivation
Accepting the natural decline in physiology is important for resetting personal goals and maintaining motivation. Focusing on personal achievements helps sustain dedication to training, which offsets physiological declines, maintains health, and preserves performance.
Conclusion
Despite the challenges, masters athletes can maintain much of their physiological state by training within their capacity and slowing down the rate of physiological decline. Key considerations include training intensity, exercise modality, and individual sex differences.