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Vascular Occlusion Training for Inclusion Body Myositis: A Novel Therapeutic Approach

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Impact of Complete Intermittent Blood Flow Restriction in Upper Limbs Strength and Neural Function.

Fábio Marzliak Pozzi de Castro¹, Lucas de Paula Oliveira¹, Rodrigo Aquino²

¹University of São Paulo.

Research Quarterly for Exercise and Sport

|February 2, 2024

Summary

Low-load strength training with intermittent blood flow restriction did not enhance biceps strength or neural adaptations. This training method may be ineffective for improving muscle strength and neural function.

Keywords:

Blood flow electromyography ischemia muscle strength resistance training

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Area of Science:

Exercise Physiology
Neuromuscular Adaptations
Strength Training

Background:

Intermittent blood flow restriction (IBFR) is used with low-load strength training (LT) to enhance muscle adaptations.
Neural adaptations are crucial for strength gains, but the chronic effects of IBFR on these adaptations are not fully understood.

Purpose of the Study:

To investigate the chronic effects of LT with complete IBFR on neural adaptations and strength in the biceps brachii.
To compare the effects of LT with and without IBFR on predicted 1 repetition maximum (1RM) and neural function.

Main Methods:

Nineteen volunteers underwent a 9-week training program, divided into LT with IBFR (LT-IBFR) and LT groups.
Strength was assessed via predicted 1RM, and neural function via root mean square (RMS) and median frequency (MDF) of electromyography signals.
Both groups performed Scott curls at 20% of predicted 1RM with 90s rest, twice weekly.

Main Results:

No significant changes in predicted 1RM were observed in either group.
The LT-IBFR group exhibited lower RMS in early repetitions and higher RMS in later repetitions compared to the LT group.
Median frequency (MDF) was lower in the last three repetitions for the LT-IBFR group, suggesting altered neural activation patterns.

Conclusions:

Low-load strength training with complete intermittent blood flow restriction appears ineffective for improving biceps brachii strength.
This training protocol did not promote significant chronic neural adaptations in the studied population.
Further research is needed to optimize IBFR protocols for effective strength and neural enhancement.