After a long-term resistance training , healthy older adults showed enhanced muscle oxygen extraction capacity , regulation of vessels and vascular endothelium function ; endurance training is reported to improve microvascular blood flow and matching of oxygen delivery to oxygen utilization , muscle oxidative capacity and muscle saturation , and walking sessions results in better muscle oxygen availability and muscle oxygen extraction capacity in older adults with peripheral arterial disease .
This review supports the fact that depending on the clinical status of the participants and the modality , exercise training improves different aspects of the muscle oxygenation in older adults
AIM To determine the effects of different modality of exercise training programs on muscle oxygenation in older adults .
Tissue (muscle) oxygen saturation (StO2): a new measure of symptomatic lower-extremity arterial disease.
OBJECTIVES Near-infrared spectroscopy provides a noninvasive method of measuring tissue oxygen saturation and has been used to monitor extremity compartment syndrome . Tissue O(2 ) saturation ( StO(2 ) ) is potentially useful in assessing patients with peripheral arterial disease ( PAD ) . The purpose s of this feasibility study are to ( 1 ) explore the diagnostic sensitivity of StO(2 ) in subjects with PAD and symptoms of intermittent claudication ( IC ) compared with normal subjects , and ( 2 ) correlate the change in StO(2 ) during and after exercise with the ankle brachial index ( ABI ) in patients with IC . Material and methods Forty-nine subjects , 35 normal and 14 PAD , from two centers were evaluated in a prospect i ve cross-sectional analysis comparing StO(2 ) by using the InSpectra tissue spectrometer and ABI at rest ( baseline ) and after treadmill exercise . Measurements were obtained at baseline and peak exercise ( normal subjects ) and at baseline , initial claudication distance ( ICD ) and absolute claudication distance ( ACD ) in PAD subjects . Endpoint values were the mean of 15 data points . Times to 50 % of StO(2 ) recovery to baseline ( T(50 ) ) and complete recovery to baseline ( T(100 ) ) were measured . Receiver-operator characteristic curves were constructed to assess the sensitivity/specificity values associated with various StO(2 ) cut-points . RESULTS The PAD patients were older ( P = .0002 ) and 57 % were male , compared with 37 % males in the normal group . The ABI was 0.68 + /- 0.14 in PAD patients versus 1.14 + /- 0.08 in normal subjects ( P < .0001 ) . The baseline StO(2 ) was 65 % in both groups . The peak exercise StO(2 ) was significantly lower and the absolute change in StO(2 ) and the percent change in StO(2 ) were significantly greater in PAD patients ( P < 0.45 ) . The T(50 ) and T(100 ) were longer in the PAD patients compared to normal subjects ( P = .0001 and .002 , respectively ) . A T(50 ) of > 70 seconds yielded a sensitivity of 89 % and a specificity of 85 % for PAD . CONCLUSIONS StO(2 ) is a new and potentially useful technique to evaluate patients with PAD . Resting StO(2 ) was similar in PAD-IC subjects and normals . There was a significantly greater drop in StO(2 ) and longer recovery times in PAD-IC subjects . Interestingly , StO(2 ) at the ICD and ACD was similar . StO(2 ) offers a different and perhaps more appropriate end point for diagnosis and monitoring of the management of patients with PAD , and may offer additional insight into the pathophysiology of exercise-induced muscle ischemia and its recovery
After a long-term resistance training , healthy older adults showed enhanced muscle oxygen extraction capacity , regulation of vessels and vascular endothelium function ; endurance training is reported to improve microvascular blood flow and matching of oxygen delivery to oxygen utilization , muscle oxidative capacity and muscle saturation , and walking sessions results in better muscle oxygen availability and muscle oxygen extraction capacity in older adults with peripheral arterial disease .
This review supports the fact that depending on the clinical status of the participants and the modality , exercise training improves different aspects of the muscle oxygenation in older adults
AIM To determine the effects of different modality of exercise training programs on muscle oxygenation in older adults .