Effects of Age and Counseling on the Cardiorespiratory Response to Graded Exercise

MICHAEL D. NELSON, STEWART R. PETERSEN, RONALD A. DLIN
2010 Medicine & Science in Sports & Exercise  
NELSON, M. D., S. R. PETERSEN, and R. A. DLIN. Effects of Age and Counseling on the Cardiorespiratory Response to Graded Exercise. Med. Sci. Sports Exerc., Vol. 42, No. 2, pp. 255-264, 2010. Purpose: To report on the normative cardiorespiratory response to a graded exercise test in a group of healthy males, 30-69 yr of age (n = 816), and to test the effect of health and fitness counseling on cardiorespiratory fitness in a subset of healthy subjects (n = 87, mean follow-up = 7.3 yr) who returned
more » ... .3 yr) who returned for at least five subsequent visits. Methods: As part of a preventive medicine service, each subject performed an incremental exercise test to exhaustion on a treadmill. Peak oxygen consumption, ventilatory threshold, HR max , and peak oxygen pulse were the primary dependent measures recorded from each test. Results: Both analyses (cross-sectional data followed by longitudinal data) showed a significant decline in peak oxygen consumption with age (0.03 and 0.04 LImin j1 Iyr j1 ), which was related to an age-associated decline in HR max (0.97 and 0.81 beats per year) and peak oxygen pulse (0.13 and 0.08 mL per beat per year). Ventilatory threshold was also influenced by age, declining in both the cross-sectional (0.02 LImin j1 Iyr j1 ) and the longitudinal (0.03 LImin j1 Iyr j1 ) comparisons. However, when ventilatory threshold and peak oxygen pulse were analyzed for changes between the initial and the follow-up (7.3 yr) visits, no difference was found. It remains unclear if this finding can be attributed to the intervention used. Conclusion: Our data support previous investigations on the effects of age on cardiorespiratory fitness. More work is needed to define the potential longitudinal benefits of interventions like those administered in the present study. was hypothesized that individuals exposed to this preventive strategy would have an attenuated annual rate of decline in cardiorespiratory fitness compared with our cross-sectional population not exposed to such an intervention.
doi:10.1249/mss.0b013e3181b0e534 pmid:19927033 fatcat:rgjfwvlz6rb2vpluswnd4gwp2e