Efficacy of Manual Diaphragm Release Technique on Transverse Abdominis Activation and Chest Expansion among Smokers and Non-Smokers – A Pilot Study.

BACKGROUND The diaphragm is a crucial muscle for respiration and core stability due to its association with the transverse abdominis (TrA). Smokers experience a diminished capacity for diaphragm mobility, adversely affecting respiratory mechanics and core engagement.

AIM The purpose of this study was to compare how the Manual Diaphragm Release Technique (MDRT) affects the activation of the TrA and chest expansion in smokers and nonsmokers.

METHODS Thirty male participants, aged 18 to 25, were selected from Galgotias University's Physiotherapy Outpatient Department. TrA activity and chest expansion at the axillary, nipple, and xiphisternum levels were evaluated both before and during the intervention. A control intervention was given to one group while the MDRT intervention was received by the other group.

RESULTS Chest expansion and TrA activation improved statistically significantly in both intervention groups. The axillary and xiphisternum levels of group B improved (but not the nipple level), while group A chest expansion improved from baseline to post-intervention. Based on PBU levels, both intervention group demonstrated a significant improvement in TrA activation.

CONCLUSION Significant improvements in group A respiratory mechanics and core muscular performance were noted after using MDRT. For people with poor diaphragmatic function in particular, more studies with bigger sample numbers and longer follow-up are necessary to validate MDRT as a therapeutic strategy.