AI Article Synopsis
- The study compared muscle oxygen dynamics during exercise between overweight (OW) and normal-weight (NW) women who had similar aerobic capacities.
- Overweight women showed higher muscle oxygen saturation (SmO) and lower levels of deoxygenated hemoglobin and total hemoglobin changes compared to normal-weight women during graded treadmill exercise.
- The findings indicate that despite matching pulmonary oxygen uptake, overweight adults had reduced muscle blood volume and oxygen extraction during exercise, which correlated with their peak aerobic capacity.
Article Abstract
The aim of this study was to compare muscle O dynamics during exercise between aerobic capacity-matched overweight and normal-weight adults. Overweight women (OW, n = 9) and normal-weight women (NW, n = 14) performed graded treadmill exercise until exhaustion. Muscle O saturation (SmO) and relative changes from rest in deoxygenated hemoglobin concentration (∆deoxy-Hb) and total hemoglobin concentration (∆total-Hb) were monitored continuously at gastrocnemius medialis muscle by near infrared spatial resolved spectroscopy. Significantly higher SmO and lower ∆deoxy-Hb and ∆total-Hb were observed in OW compared with NW. Pulmonary O uptake (VO) normalized by fat-free mass was matched between groups. In both groups, peak VO was significantly correlated with change in SmO and ∆deoxy-Hb. Our findings suggest that both muscle blood volume and deoxygenation were lower in overweight adults, compared to aerobic capacity-matched normal-weight adults. Moreover, lowered muscle O extraction was related to peak VO in overweight adults, as well as in normal-weight adults.
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| http://dx.doi.org/10.1007/978-3-030-34461-0_28 | DOI Listing |
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