Predictors of Running Performance
running speed is a better predictor of running performance (e.g.
marathon time) than is either VO2 max or the running economy.
Lactate turnpoint and respiratory ventilation threshold (a.k.a.
anaerobic threshold) are other variable that accurately predict
athletic performance, particularly in running events of 10 to
Noakes, T.D.: Implications of exercise testing for prediction
of athletic performance, a contemporary perspective, Medicine
and Science in Sports and Exercise, 1988; 20 (4): 319-330
Inverted T wave with strong QRS voltage also normal in athlete's.
Up to 10% of trained athletes may exhibit 2nd degree heart block
Houston TP, Puffer JC, Rodney WM: The Athletic Heart Syndrome,
N Eng J Med, 1985; 313 (1): 24-32
Many arrhythmias observed in athletes can be considered normal
for this population and are not related to any pathology. Several
of these rhythm and electrocardiographic changes seen in aerobic
athletes at rest resolve during exercise. Routine screening for
cardiovascular artery disease for asymptomatic athletes is not
recommended due to the high rate of false positives. If the athlete
is able to exercise at maximal intensity without difficulty,
it can be concluded that abnormal ECG changes are likely attributed
to the Athletic Heart Syndrome.
Crown LA, Hizon JW, Rodney WM, (1997) The Athlete's Heart,
The Team Physician's Handbook, Mosby, 2: 294-303
VO2 max Differences
The aerobic capacity of women is typically about 10-20% less
than men (Astrand, 1977).
VO2 max steadily increases during childhood and reaches a
peak at around the age of 20, after which it slowly declines.
The VO2 max of a highly trained endurance athlete is about
twice that of an average person.
VO2 max Estimate Inaccuracies
An overestimation of VO2 max can result from failure to achieve
steady state or rail holding during treadmill testing. Other
inaccuracies can result from improperly calibrated ergometers
and factors that change mechanical efficiency such as wind, snow,
sand, and gait abnormalities.