Resistance training increases basal limb blood flow and vascular conductance in aging humans

Abstract

Age-related reductions in basal limb blood flow and vascular conductance are associated with the metabolic syndrome, functional impairments, and osteoporosis. We tested the hypothesis that a strength training program would increase basal femoral blood flow in aging adults. Twenty-six sedentary but healthy middle-aged and older subjects were randomly assigned to either a whole body strength training intervention group (52 +/- 2 yr, 3 men, 10 women) who underwent three supervised resistance training sessions per week for 13 wk or a control group (53 +/- 2 yr, 4 men, 9 women) who participated in a supervised stretching program. At baseline, there were no significant differences in blood pressure, cardiac output, basal femoral blood flow (via Doppler ultrasound), vascular conductance, and vascular resistance between the two groups. The strength training group increased maximal strength in all the major muscle groups tested (P < 0.05). Whole body lean body mass increased (P < 0.05) with strength training, but leg fat-free mass did not. Basal femoral blood flow and vascular conductance increased by 55-60% after strength training (both P < 0.05). No such changes were observed in the control group. In both groups, there were no significant changes in brachial blood pressure, plasma endothelin-1 and angiotensin II concentrations, femoral artery wall thickness, cardiac output, and systemic vascular resistance. Our results indicate that short-term strength training increases basal femoral blood flow and vascular conductance in healthy middle-aged and older adults.

Effects of muscle contraction timing during resistance training on vascular function

“…Recent studies reported that resistance training or aerobic training increased brachial and femoral artery diameter. 31,[34][35][36] These results suggest that both types of training cause enlargement at the level of the major conduit arteries. The present findings extend these results from endurance-trained individuals to those who perform resistance training.…”

“…Short-term resistance training increases basal femoral BF and VC, which suggests that resistance training affects basal limb perfusion through a mechanism related to its effects on glucose uptake. 35 Therefore, hemodynamic improvement induced by resistance training is clinically important. However, the physiological mechanisms underlying the changed hemodynamics during resistance training remain obscure.…”

Nonfat milk attenuates acute hyperglycemia in individuals with android obesity: A randomized control trial

“…Based on means, SD , and anticipated effect sizes from previous studies, sample sizes were determined for group differences in glucose responses to dietary (primarily dairy) interventions (Gannon, Nuttall, Lane, & Burmeister, 1992; Liljeberg Elmstahl & Bjorck, 2001; Nilsson, Stenberg, Frid, Holst, & Bjorck, 2004; Ostman et al., 2001; von Post‐Skagegard et al., 2006). The power calculation for femoral blood flow and vascular conductance was performed on our previous published work because there are no published group data for these variables (Anton et al., 2006b; Dinenno, Tanaka, Stauffer, & Seals, 2001; Dinenno et al., 2001). The magnitude of group differences ranged from 15% (arterial blood pressure) to 45% (femoral vascular resistance), representing physiologically meaningful differences.…”

Força muscular versus pressão arterial de repouso: uma revisão baseada no treinamento com pesos

“…Foram encontradas 12 referências sobre o treinamento com pesos em longo prazo e a PA de repouso em normotensos (7,(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39) e seis referências em hipertensos (5,32,(40)(41)(42)(43) . Dos estudos com normotensos, duas referências possuíam dois grupos experimentais (35,37) .…”