MedTrace Logo

Recruitment of the Diaphragm and Sternocleidomastoid Muscle During Loaded Inspiration on Varying Sitting Support in Healthy Adults

NCT07007923 · Status: NOT_YET_RECRUITING · Type: OBSERVATIONAL · Enrollment: 45

Last updated 2025-06-06

No results posted yet for this study

Summary

This is a cross-sectional obsessional study.

This study explores how different sitting conditions affect two important muscles-the diaphragm and the sternocleidomastoid (SCM)-work during breathing exercises. The diaphragm is the main muscle for breathing, while the SCM helps when taking deeper breaths. Understanding how these muscles interact while sitting under various conditions can help improve breathing training techniques.

The study's objectives are (1) to investigate the relationship between diaphragm thickness fraction with 4 different sitting conditions during loaded inspiration among healthy adults and (2) To investigate the relationship between SCM activity with 4 different sitting conditions during loaded inspiration among healthy adults.

This research will conduct healthy adults, who will be instructed to breathe against resistance provided by the IMT while sitting on four different conditions: a regular chair, a soft pad with feet on the ground, a soft pad with feet on two additional soft pads, and a single soft pad with both feet on one pad. By using ultrasound to measure how thick the diaphragm gets and surface electromyography (sEMG) to track SCM activity, the data will be gathered on how these muscles function under different conditions.

The goal is to find out if sitting on unstable surfaces, like soft pads, can enhance diaphragm use compared to a stable chair. These surfaces may change how effectively the diaphragm and SCM work together. This research could lead to better recommendations for inspiratory muscle training (IMT), which helps strengthen these muscles, especially for people with breathing difficulties.

By identifying how posture influences muscle recruitment during breathing exercises, hoping to contribute valuable insights that can improve rehabilitation programs for individuals with respiratory conditions.

Conditions

  • Diaphragm

Sponsors & Collaborators

  • Hong Kong Metropolitan University

    lead OTHER

Principal Investigators

  • William Tsang · Hong Kong Metropolitan University

Eligibility

Min Age
18 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-06-19
Primary Completion
2025-07-31
Completion
2026-04-20

Countries

  • Hong Kong

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07007923 on ClinicalTrials.gov