Key result
Local vibration combined with blood flow restriction elicited greater electromyography amplitude in the rectus femoris and biceps compared to local vibration alone (P<0.05).
Why the study?
Does local vibration plus blood flow restriction increase muscle activation compared to local vibration alone in physically inactive males?
RCT (n=8)
Randomly assigned
Does local vibration plus blood flow restriction increase muscle activation compared to local vibration alone in physically inactive males?
Local vibration combined with blood flow restriction acutely increases muscle activation in specific muscles (rectus femoris and biceps) compared to local vibration alone.
Answers are grounded in this paper and cite their sources.
May augment activation protocols for inactive adults; extends local vibration evidence by showing additive blood flow restriction effects.
BACKGROUND: Blood flow restriction (BFR) resistance exercise often elicits additive response of muscle activation. It is not clear whether local vibration (LV)-induced involuntary muscle contraction plus BFR would elicit an additive response of muscle activation. OBJECTIVE: To investigate the effects of LV exercise with and without BFR on muscle activation. METHODS: Eight physically inactive males were randomly assigned to a sequence of LV (0.45 mm amplitude, 35 Hz sinusoid, lasting 1 min) treatments on unilateral antagonistic muscle groups, including the upper arm (biceps and triceps), the calf (gastrocnemius, GAS; tibialis anterior, TA) and the thigh (rectus femoris, RF; biceps femoris, BF), in a repeated-measures counterbalanced design, with a 5-min interval separating the treatments. The LV treatments on each of the limbs included one bout of LV and one bout of LV [Formula: see text] BFR (inflated to 200 mmHg) in a counterbalanced order. RESULTS: Only the RF and biceps in the measured muscles showed greater electromyography (EMG) values during LV [Formula: see text] BFR than those during LV ([Formula: see text] 0.05). CONCLUSIONS: LV [Formula: see text] BFR elicits an increase in EMG amplitude in some muscles, with obviously greater values in the RF for the thigh and in the biceps for the upper limb.
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Lin et al. (2017) conducted an RCT in Physically inactive (n=8). Local vibration with blood flow restriction vs. Local vibration alone was evaluated on Electromyography (EMG) values (p=<0.05). Local vibration combined with blood flow restriction elicited greater electromyography amplitude in the rectus femoris and biceps compared to local vibration alone (P<0.05).
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