Abstract
We examined the hemodynamic factors associated with the lower maximal O 2 consumption (V̇O(2max)) in older formerly elite distance runners. Heart rate and V̇O 2 were measured during submaximal and maximal treadmill exercise in 11 master [66 ± 8 (SD) yr] and 11 young (32 ± 5 yr) male runners. Cardiac output was determined using acetylene rebreathing at 30, 50, 70, and 85% V̇O(2max). Maximal cardiac output was estimated using submaximal stroke volume and maximal heart rate. V̇O(2max) was 36% lower in master runners (45.0 ± 6.9 vs. 70.4 ± 8.0 ml·kg -1·min -1, P ≤ 0.05), because of both a lower maximal cardiac output (18.2 ± 3.5 vs. 25.4 ± 1.7 l·min -1) and arteriovenous O 2 difference (16.6 ± 1.6 vs. 18.7 ± 1.4 ml O 2·100 ml blood -1, P ≤ 0.05). Reduced maximal heart rate (154.4 ± 17.4 vs. 185 ± 5.8 beats·min -1) and stroke volume (117.1 ± 16.1 vs. 137.2 ± 8.7 ml·beat -1) contributed to the lower cardiac output in the older athletes (P ≤ 0.05). These data indicate that V̇O(2max) is lower in master runners because of a diminished capacity to deliver and extract O 2 during exercise.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 949-954 |
| Number of pages | 6 |
| Journal | Journal of Applied Physiology |
| Volume | 66 |
| Issue number | 2 |
| State | Published - 1989 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Endocrinology
- Physiology
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Physiological factors associated with the lower maximal oxygen consumption of master runners. / Rivera, A. M.; Pels, A. E.; Sady, S. P.; Sady, M. A.; Cullinane, E. M.; Thompson, P. D.
In: Journal of Applied Physiology, Vol. 66, No. 2, 1989, p. 949-954.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Physiological factors associated with the lower maximal oxygen consumption of master runners
AU - Rivera, A. M.
AU - Pels, A. E.
AU - Sady, S. P.
AU - Sady, M. A.
AU - Cullinane, E. M.
AU - Thompson, P. D.
PY - 1989
Y1 - 1989
N2 - We examined the hemodynamic factors associated with the lower maximal O 2 consumption (V̇O(2max)) in older formerly elite distance runners. Heart rate and V̇O 2 were measured during submaximal and maximal treadmill exercise in 11 master [66 ± 8 (SD) yr] and 11 young (32 ± 5 yr) male runners. Cardiac output was determined using acetylene rebreathing at 30, 50, 70, and 85% V̇O(2max). Maximal cardiac output was estimated using submaximal stroke volume and maximal heart rate. V̇O(2max) was 36% lower in master runners (45.0 ± 6.9 vs. 70.4 ± 8.0 ml·kg -1·min -1, P ≤ 0.05), because of both a lower maximal cardiac output (18.2 ± 3.5 vs. 25.4 ± 1.7 l·min -1) and arteriovenous O 2 difference (16.6 ± 1.6 vs. 18.7 ± 1.4 ml O 2·100 ml blood -1, P ≤ 0.05). Reduced maximal heart rate (154.4 ± 17.4 vs. 185 ± 5.8 beats·min -1) and stroke volume (117.1 ± 16.1 vs. 137.2 ± 8.7 ml·beat -1) contributed to the lower cardiac output in the older athletes (P ≤ 0.05). These data indicate that V̇O(2max) is lower in master runners because of a diminished capacity to deliver and extract O 2 during exercise.
AB - We examined the hemodynamic factors associated with the lower maximal O 2 consumption (V̇O(2max)) in older formerly elite distance runners. Heart rate and V̇O 2 were measured during submaximal and maximal treadmill exercise in 11 master [66 ± 8 (SD) yr] and 11 young (32 ± 5 yr) male runners. Cardiac output was determined using acetylene rebreathing at 30, 50, 70, and 85% V̇O(2max). Maximal cardiac output was estimated using submaximal stroke volume and maximal heart rate. V̇O(2max) was 36% lower in master runners (45.0 ± 6.9 vs. 70.4 ± 8.0 ml·kg -1·min -1, P ≤ 0.05), because of both a lower maximal cardiac output (18.2 ± 3.5 vs. 25.4 ± 1.7 l·min -1) and arteriovenous O 2 difference (16.6 ± 1.6 vs. 18.7 ± 1.4 ml O 2·100 ml blood -1, P ≤ 0.05). Reduced maximal heart rate (154.4 ± 17.4 vs. 185 ± 5.8 beats·min -1) and stroke volume (117.1 ± 16.1 vs. 137.2 ± 8.7 ml·beat -1) contributed to the lower cardiac output in the older athletes (P ≤ 0.05). These data indicate that V̇O(2max) is lower in master runners because of a diminished capacity to deliver and extract O 2 during exercise.
UR - http://www.scopus.com/inward/record.url?scp=0024512097&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024512097&partnerID=8YFLogxK
M3 - Article
C2 - 2708223
AN - SCOPUS:0024512097
VL - 66
SP - 949
EP - 954
JO - Journal of Applied Physiology
JF - Journal of Applied Physiology
SN - 8750-7587
IS - 2
ER -