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

Blood Flow Restriction Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04270695
• Other study ID #: CRREC-109-007
• Status: Completed
• Phase: N/A
• Start date: March 3, 2020
• Est. completion date: July 9, 2021

Study information

• Verified date: October 2022
• Source: China Medical University Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 34
• Est. completion date: July 9, 2021
• Est. primary completion date: April 3, 2021
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 20 Years to 35 Years

Eligibility

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

Related Conditions & MeSH terms

• Blood Flow Restriction
• draw-in Maneuver
• Transverse Abdominis

Intervention

Behavioral:
• blood flow restriction
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.
• sham blood flow restriction
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.

Locations

Country	Name	City	State
Taiwan	China Medical University	Taichung

Sponsors (1)

Lead Sponsor	Collaborator
China Medical University Hospital

Country where clinical trial is conducted

Taiwan, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Muscle Thickness Change of Transverse Abdominis	muscle thickness change on week3, 4 and 5 compared with baseline	3,4,5 weeks
Secondary	Internal Oblique Thickness Change	Data represents the muscle thickness change on week 3, 4 and 5 compared with baseline. The thickness of the muscle was calculated by the differences between the muscle thickness during contraction and the muscle thickness during resting position. If the muscle thickness during contraction was smaller than the muscle thickness during the resting position, therefore, the values would be negative. The values in baseline presented as negative may be because the internal oblique muscle thickness during contraction was smaller before receiving any training. Previous studies stated that after receiving ADIM and BFR training, the internal oblique muscle thickness will be thicker. Therefore, it was reasonable that the results in baseline presented negative values while the values became positive after receiving training.	baseline,3,4,5 weeks
Secondary	External Oblique Thickness Change	Data represents the muscle thickness change on week 3, 4 and 5 compared with baseline. The thickness of the muscle was calculated by the differences between the muscle thickness during contraction and the muscle thickness during resting position. If the muscle thickness during contraction was smaller than the muscle thickness during the resting position, therefore, the values would be negative. The values in baseline presented as negative may be because the external oblique muscle thickness during contraction was smaller before receiving any training. After receiving ADIM and BFR training, the tranverse abdominis and internal oblique muscle thickness will be thicker while the external oblique will be thinner due to the compression from the TrA and IO muscles.	baseline,3,4,5weeks