TY - JOUR
T1 - Walking may be related to less vascular stiffness in the Activity Counseling Trial (ACT)
AU - Havlik, Richard J.
AU - Phillips, Caroline L.
AU - Brock, Dwight B.
AU - Lohman, Kurt
AU - Haskell, William
AU - Snell, Peter
AU - O'Toole, Mary
AU - Ribisl, Paul
AU - Vaitkevicius, Peter
AU - Spurgeon, Harold A.
AU - Lakatta, Edward G.
AU - Pullen, Paul
N1 - Funding Information:
Acitivity Counseling Trial ACT was supported by the National Heart, Lung, and Blood Institute through the following contracts: N01-HC-45135 (S.N. Blair, PI), N01-HC-45136 (A.C. King, PI), N01-HC-45137 (W.B. Applegate, PI), and N01-HC-45138 (T.M. Morgan, PI) and through an intraagency agreement with the National Institute on Aging.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/8
Y1 - 2005/8
N2 - Background: The ACT was a clinical trial of various patient education and counseling interventions to increase physical activity in sedentary primary care populations. It provided the opportunity to measure the effect of increasing physical activity on aortic pulse wave velocity (APWV), a measure of vascular stiffness, in a relatively healthy middle-aged population. The effects of the interventions, as well as the impact of walking and correlates such as older age and maximal oxygen uptake (V.o2max), on APWV were assessed. Methods: The participants in this study were a subset of the 874 persons recruited for the ACT. Information about self-reported physical activity and disease status was collected at baseline (464 persons), 6- month (528 persons), and 24-month (555 persons) intervals. Physiological measures included APWV, systolic blood pressure, and other correlates. Results: In multivariate analyses, the various treatment arms did not have a significant effect on APWV. However, walking in hours per day was associated with slower APWV times or less stiffness (P = .03). This was significant for women and consistent but not significant for men. In addition, age, clinic site, race, systolic blood pressure, and V.o2max were independently associated with APWV. Conclusions: Increased walking frequency over a 24-month period was predictive of reduced vascular stiffness in ACT. The more significant result for walking frequency in women than in men might be caused by the presence of a low V.o2max or physical activity threshold for an effect of walking on APWV, which most women achieved but most men had surpassed at the start of the study. Although needing confirmation because this was a secondary analysis, modest physical activity may have a beneficial effect on large vessel structure.
AB - Background: The ACT was a clinical trial of various patient education and counseling interventions to increase physical activity in sedentary primary care populations. It provided the opportunity to measure the effect of increasing physical activity on aortic pulse wave velocity (APWV), a measure of vascular stiffness, in a relatively healthy middle-aged population. The effects of the interventions, as well as the impact of walking and correlates such as older age and maximal oxygen uptake (V.o2max), on APWV were assessed. Methods: The participants in this study were a subset of the 874 persons recruited for the ACT. Information about self-reported physical activity and disease status was collected at baseline (464 persons), 6- month (528 persons), and 24-month (555 persons) intervals. Physiological measures included APWV, systolic blood pressure, and other correlates. Results: In multivariate analyses, the various treatment arms did not have a significant effect on APWV. However, walking in hours per day was associated with slower APWV times or less stiffness (P = .03). This was significant for women and consistent but not significant for men. In addition, age, clinic site, race, systolic blood pressure, and V.o2max were independently associated with APWV. Conclusions: Increased walking frequency over a 24-month period was predictive of reduced vascular stiffness in ACT. The more significant result for walking frequency in women than in men might be caused by the presence of a low V.o2max or physical activity threshold for an effect of walking on APWV, which most women achieved but most men had surpassed at the start of the study. Although needing confirmation because this was a secondary analysis, modest physical activity may have a beneficial effect on large vessel structure.
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U2 - 10.1016/j.ahj.2004.09.006
DO - 10.1016/j.ahj.2004.09.006
M3 - Article
C2 - 16086929
AN - SCOPUS:23644446751
SN - 0002-8703
VL - 150
SP - 270
EP - 275
JO - American Heart Journal
JF - American Heart Journal
IS - 2
ER -