[BuoresBuores]

Effects of Handgrip Training With Venous Restriction on Brachial Artery Vasodilation. Created Date: 2009-12-18

Previous studies have shown that resistance training with restricted venous blood flow (Kaatsu) results in significant strength gains and muscle hypertrophy. However, few studies have examined the concurrent vascular responses following restrictive venous blood flow training protocols. PURPOSE:: To examine the effects of 4 weeks of handgrip exercise training, with and without venous restriction, on handgrip strength and brachial artery flow mediated dilation (BAFMD). METHODS:: Twelve participants (age=22+/-1yr; male = 5, female = 7), completed 4 weeks of bilateral handgrip exercise training (Duration: 20 min; Intensity: 60% of the MVC; Cadence: 15 grips*min; Frequency: 3 sessions*week). During each session venous blood flow was restricted in one arm (Experimental arm = EXP) using a pneumatic cuff placed 4 cm proximal to the antecubital fossa, and inflated to 80 mmHg for the duration of each exercise session. The EXP and control (CON) arm were randomly selected. Handgrip strength was measured using a hydraulic hand dynamometer. Brachial diameters and blood velocity profiles were assessed, using Doppler ultrasonography, before and after 5 min of forearm occlusion (200 mmHg), prior to and at the end of 4 weeks exercise. RESULTS:: Following exercise training, handgrip strength increased 8.32% (p=0.05) in the CON arm and 16.17% (p=0.05) in the EXP arm. BAFMD increased 24.19% (p=0.0001) in the CON arm, and decreased 30.36% (p=0.0001) in the EXP arm. CONCLUSION:: The data indicate handgrip training combined with venous restriction results in superior strength gains, but reduced BAFMD compared to the non-restricted arm.

PMID: 20019641

Såg att det fanns en vad-artikel á la Kaatsu så jag tänkte komplettera med denna. Fördubblad styrkeökning är inte dåligt. Varför kollar man på BAFMD? Vilken klinisk relevans har detta?

Är detta säkert eller förstör man sina kärl för all framtid? Någon som vet?