TY - JOUR
T1 - Muscle pump and central command during recovery from exercise in humans
AU - Carter, Robert
AU - Watenpaugh, Donald E.
AU - Wasmund, Wendy L.
AU - Wasmund, Stephen L.
AU - Smith, Michael L.
PY - 1999/10
Y1 - 1999/10
N2 - We sought to determine the relative contributions of cessation of skeletal muscle pumping and withdrawal of central command to the rapid decrease in arterial pressure during recovery from exercise. Twelve healthy volunteers underwent three exercise sessions, each consisting of a warm-up, 3 min of cycling at 60% of maximal heart rate, and 5 min of one of the following recovery modes: seated (inactive), loadless pedaling (active), and passive cycling. Mean arterial pressure (MAP), cardiac output, thoracic impedance, and heart rate were measured. When measured 15 s after exercise, MAP decreased less (P < 0.05) during the active (-3 ± 1 mmHg) and passive (- 6 ± 1 mmHg) recovery modes than during inactive (-18 ± 2 mmHg) recovery. These differences in MAP persisted for the first 4 min of recovery from exercise. Significant maintenance of central blood volume (thoracic impedance), stroke volume, and cardiac output paralleled the maintenance of MAP during active and passive conditions during 5 min of recovery. These data indicate that engaging the skeletal muscle pump by loadless or passive pedaling helps maintain MAP during recovery from submaximal exercise. The lack of differences between loadless and passive pedaling suggests that cessation of central command is not as important.
AB - We sought to determine the relative contributions of cessation of skeletal muscle pumping and withdrawal of central command to the rapid decrease in arterial pressure during recovery from exercise. Twelve healthy volunteers underwent three exercise sessions, each consisting of a warm-up, 3 min of cycling at 60% of maximal heart rate, and 5 min of one of the following recovery modes: seated (inactive), loadless pedaling (active), and passive cycling. Mean arterial pressure (MAP), cardiac output, thoracic impedance, and heart rate were measured. When measured 15 s after exercise, MAP decreased less (P < 0.05) during the active (-3 ± 1 mmHg) and passive (- 6 ± 1 mmHg) recovery modes than during inactive (-18 ± 2 mmHg) recovery. These differences in MAP persisted for the first 4 min of recovery from exercise. Significant maintenance of central blood volume (thoracic impedance), stroke volume, and cardiac output paralleled the maintenance of MAP during active and passive conditions during 5 min of recovery. These data indicate that engaging the skeletal muscle pump by loadless or passive pedaling helps maintain MAP during recovery from submaximal exercise. The lack of differences between loadless and passive pedaling suggests that cessation of central command is not as important.
KW - Arterial blood pressure
KW - Cardiac output
KW - Heart rate
KW - Peripheral resistance
KW - Stroke volume
UR - http://www.scopus.com/inward/record.url?scp=0032863523&partnerID=8YFLogxK
U2 - 10.1152/jappl.1999.87.4.1463
DO - 10.1152/jappl.1999.87.4.1463
M3 - Article
C2 - 10517779
AN - SCOPUS:0032863523
VL - 87
SP - 1463
EP - 1469
JO - Journal of Applied Physiology
JF - Journal of Applied Physiology
SN - 8750-7587
IS - 4
ER -