Influence of Body Mass Index on Transverse Abdominis strength and Iliopsoas length in asymptomatic young adults: A Correlational Study

BACKGROUND: The global rise in obesity makes it more crucial to understand the connection between BMI and the functionality of the core muscles in order to understand the associated biomechanics and pathomechanics. This study evaluates the influence of Body Mass Index (BMI) on Transverse Abdominis strength and Iliopsoas length, both important components of core stability and posture which can help us to determine how different body mass categories affect these attributes.
OBJECTIVE: The study aims to investigate the potential link between BMI, Transverse Abdominis strength, and Iliopsoas flexibility among asymptomatic young adults. By assessing the correlation between these, the potential physical complications related to varying body compositions and the design of an effective treatment intervention can be determined.
METHOD: This observational study investigates the relationship between BMI, Transverse abdominis strength, and Iliopsoas length among young adults. A purposive sampling technique yielded 50 participants with varying categories of BMI calculated using their height and weight. The strength of the Transverse abdominis was measured using a Pressure Biofeedback Unit, and the best of the three measurements was noted. The length of the Iliopsoas was measured using the Modified Thomas Test. Statistical analysis using IBM SPSS 26 aimed to identify the correlation between these measures.
RESULT: The Shapiro-Wilk test revealed a non-normal distribution for demographic variables, including age, weight, BMI, and left leg iliopsoas length. However, height, average Transverse Abdominis strength, and right leg Iliopsoas length show normal distribution. Spearman correlation analysis indicated a significant correlation between BMI with right leg Iliopsoas length (r = -0.414, p = 0.003), and with left leg Iliopsoas length (r = -0.377, p = 0.007) as well.
CONCLUSION: This study suggests a link between BMI and Iliopsoas flexibility in asymptomatic young adults. No correlation was observed between BMI and Transverse Abdominis strength. Understanding the interplay between the core musculature and overall weight status can potentially help clinicians determine treatment strategies to enhance lower back health. Further research can confirm this association and inform preventive strategies for associated problems.

KEYWORDS: Body Mass Index, Core Stability, Body Composition, Posture, Young Adult