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Eccentric training decreases paratendon capillary blood flow and preserves paratendon oxygen saturation in chronic Achilles tendinopathy
▸ Knobloch K, Kraemer R, Jagodzinski M, Zeichen J, Meller R, Vogt PM. J Orthop Sports Phys Ther 2007;37:269–76
In patients suffering from Achilles tendinopathy there are changes in tendon and paratendon microcirculation (at the insertion and the mid-portion) – eccentric training is a common treatment for this condition.
Does 12 weeks of daily eccentric training alter paratendon microcirculation in individuals suffering from chronic Achilles tendinopathy?
Subjects: 20 patients with chronic Achilles tendinopathy.
Experimental procedure: Based on the location of the tendinopathy (insertion (I) or mid-portion (MP)) subjects were randomly allocated to either a control group (CON = 5, I = 3, MP = 2) or an eccentric training group (ECC = 15, I = 9, MP = 6) (3 sets of 15 reps daily) for 12 weeks. Pain (VAS) as well as capillary blood flow (flow), tissue oxygen saturation (SO2), and post capillary venous filling pressure (rHb) were measured (using a laser Doppler system at 8 paratendon locations at depths of 2 (superficial) and 8 mm (deep) before and after 12 weeks.
Measures of outcome: Pain, blood flow, tissue oxygen saturation, post-capillary venous filling pressure.
Pain: There was a 48% reduction in pain in the ECC group after 12 weeks (Pre 4.1 (SD 2.9), Post 2.1 (2.2), p<0.05).
Blood flow: There was a decrease in deep paratendon blood flow at the mid-portion paratendon location (p<0.05) while superficial blood flow at …