caa a22 4500 469055839 CHVBK 20180323132843.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00717959 doi (NATIONALLICENCE)springer-10.1007/BF00717959 Physiological responses of young and elderly men to prolonged exercise at critical power [Elektronische Daten] [T. Overend, D. Cunningham, D. Paterson, W. Smith] Summary: The critical power (CP) of a muscle group or individual may represent the highest rate of work which can be performed for an extended period. We investigated this concept in young (n = 13, 24.5 years) and elderly (n = 12, 70.7 years) active men by first determining CP and then comparing responses elicited by 24 min of cycle exercise at power outputs (ω) corresponding to CP. Values from the final 2 min of the 24-min ride were expressed relative to maximal values established in a ramp test. CP for the elderly was only 65% that for the young, but on a relative basis, it was significantly higher both in terms of ω (67 vs 62% of ωmax) and oxygen consumption ( $$\dot VO_2 $$ ) (91.5 vs 85.2% of maximum oxygen consumption). There were no group differences in relative values for ventilation ( $$\dot V_E $$ ), heart rate or respiratory exchange ratio (R). During the 24-min ride, $$\dot VO_2 $$ andR achieved a plateau in both groups, while $$\dot V_E $$ , blood lactate and arterialPCO2 continued to change in the young. It was concluded that CP can be determined in active elderly men, but that CP may not represent a true non-fatiguing work rate in either young or elderly men. Springer-Verlag, 1992 Critical power nationallicence Ageing nationallicence Steady-state exercise nationallicence Anaerobic work capacity nationallicence Exhaustion time nationallicence Overend T. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut Cunningham D. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut Paterson D. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut Smith W. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/2(1992-03-01), 187-193 0301-5548 64:2<187 1992 64 421 https://doi.org/10.1007/BF00717959 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00717959 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Overend T. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Cunningham D. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Paterson D. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Smith W. Centre for Activity and Ageing, N6A 3K7, London, Ontario, Canada aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/2(1992-03-01), 187-193 0301-5548 64:2<187 1992 64 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer