Purpose: The present longitudinal study assessed cardiorespiratory capacity and running economy of Olympic athletes over several decades to measure changes in fitness in an elite group during aging. Methods: Twenty-six male runners training for the 1968 Olympics were recruited. Heart rate, O2max, ventilation, and running economy were measured in 1968, 1993, and 2013. In 2013, 22 of the original runners participated: three passed away between 1993 and 2013, and one declined to participate. Results: The mean (+/-SD) maximum heart rate (bpm) was 178+/-10.6 in 1968, 176+/-13.1 in 1993, and 168+/-16.4 in 2013 with a difference from the predicted maximum heart rates in 1968 and 2013 (both P<.001 the mean v dot above was in and based on original body weight were respectively which higher than measured values at those times p declined each time decline predicted for .500 r2 .567 running economy greater conclusion: our data suggested that initial fitness younger years contributed to with aging despite an expected age-related drop fitness. also older adults could maintain high levels of cardiorespiratory as they age. expectations during should be more robust especially since bolster quality life. american college sports medicine>
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