Blood Flow Restriction Training Combined With Abdominal draw-in Maneuver on Transverse Abdominis Strengthening

China Medical University

Status: Completed

Conditions: Blood Flow Restriction; draw-in Maneuver; Transverse Abdominis

Treatments: Behavioral: blood flow restriction; Behavioral: sham blood flow restriction

Study type: Interventional

Funder types: Other

Identifiers

NCT04270695

CRREC-109-007

Details and patient eligibility

About

This study expects to provide a new alternative way to improve the muscle activation, strength and activation of transverse abdominis in abdominal draw-in maneuver combined with blood flow restriction.

Full description

The transverse abdominis (TrA) is the deepest muscle layer of lateral and anterior abdominal wall and also known as a significant component of core stability. Abdominal draw-in maneuver (ADIM) is the main for the strengthening of the deep muscle, however, sufficient activation of TrA by ADIM is limited. Blood flow restriction (BFR) training is a technique combined with low intensity exercise that produces similar results to high intensity training. However, there is few evidences for BFR training on core muscles.

Healthy adults (age ranged 18-34 years and BMI between 18.5~24.99) were randomly recruited in the study. For the intervention group, an inflatable cuff (14 cm in width * 84 cm in length) is warped around abdominal muscles below ribs which may cause to at least 60% restriction of blood flow detected by Power Doppler ultrasonography. All participants are instructed to perform ADIM both condition of BFR and BFR-free twice a week, for six weeks. Outcome measurements include Double leg lowering test (DLLT) for muscle strength, brightness mode ultrasound (USD) for muscle hypertrophy and electromyography (EMG) muscle activation. The same physical therapist will do the measurement at first week, third week and the sixth week.

Enrollment: 34 patients

Sex: All

Ages: 20 to 35 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Healthy subjects
• 20~35 years old
• BMI 18.5~24.99

Exclusion criteria

• Hypertension
• Have cardio-vascular disease
• Used to have abdominal operation or wound
• Have spinal surgeries or deformities
• Known neuromuscular or joint disease
• Pregnant

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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34 participants in 2 patient groups

blood flow restriction

Experimental group

Description:

An inflatable cuff (14 cm in width \* 84 cm in length) is warped around abdominal muscles below ribs which may cause to at least 60% restriction of blood flow detected by Power Doppler ultrasonography. All participants are instructed to perform abdominal draw-in maneuver both condition of BFR and BFR-free twice a week, for six weeks.

Treatment:

Behavioral: blood flow restriction

sham blood flow restriction

Sham Comparator group

Description:

an inflatable cuff (14 cm in width \* 84 cm in length) is warped around abdominal muscles below ribs without inflation. All participants are instructed to perform abdominal draw-in maneuver.

Treatment:

Behavioral: sham blood flow restriction