Effects of supervised exercise training on lower-limb cutaneous microvascular reactivity in adults with venous ulcers

Purpose To investigate the effects of a 12-week supervised exercise programme on lower-limb cutaneous microvascular reactivity in adults with venous leg ulceration. Methods Thirty-eight adults with unilateral venous ulceration who were being treated with lower-limb compression therapy (58% male; mea...

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Veröffentlicht in:European journal of applied physiology 2018-02, Vol.118 (2), p.321-329
Hauptverfasser: Tew, Garry A., Gumber, Anil, McIntosh, Emma, Kesterton, Sue, King, Brenda, Michaels, Jonathan A., Klonizakis, Markos
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Sprache:eng
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Zusammenfassung:Purpose To investigate the effects of a 12-week supervised exercise programme on lower-limb cutaneous microvascular reactivity in adults with venous leg ulceration. Methods Thirty-eight adults with unilateral venous ulceration who were being treated with lower-limb compression therapy (58% male; mean age 65 years; median ulcer size 5 cm 2 ) were randomly allocated to exercise or control groups. Exercise participants ( n  = 18) were invited to attend thrice weekly sessions of lower-limb aerobic and resistance exercise for 12 weeks. Cutaneous microvascular reactivity was assessed in the gaiter region of ulcerated and non-ulcerated legs at baseline and 3 months using laser Doppler fluxmetry coupled with iontophoresis of acetylcholine (ACh) and sodium nitroprusside (SNP). Cutaneous vascular conductance (CVC) was calculated as laser Doppler flux (AU)/mean arterial pressure (mmHg). Results Thirty-seven participants completed follow-up assessments. Median session attendance was 36 (range 2–36). Analyses of covariance revealed greater peak CVC responses to ACh in the exercise group at 3 months in both the ulcerated (adjusted difference = 0.944 AU/mmHg; 95% CI 0.504–1.384) and non-ulcerated (adjusted difference = 0.596 AU/mmHg; 95% CI 0.028–1.164) legs. Peak CVC responses to SNP were also greater in the exercise group at 3 months in the ulcerated leg (adjusted difference = 0.882 AU/mmHg; 95% CI 0.274–1.491), but not the non-ulcerated leg (adjusted difference = 0.392 AU/mmHg; 95% CI − 0.377 to 1.161). Conclusion Supervised exercise training improves lower-limb cutaneous microvascular reactivity in adults with venous leg ulceration.
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-017-3772-0