Diaphragm Movement
Conditions
Keywords
diaphragmatic motion, m-mode ultrasonography, postural function
Brief summary
The aim of this study is to describe the movement of the diaphragm during postural activation of the trunk muscles in comparison with tidal breathing.
Detailed description
Diaphragm movement will be measured by m-mode ultrasonography in a standing position. 30-35 healthy subjects will participate in the study. The movement of the diaphragm will be measured during tidal breathing then, during holding a load corresponding to 20% of the subject´s body weight and finally, during voluntary contraction of the trunk muscles. Trunk muscles contraction will be measured by a special device with pressure sensors placed on a trunk surface. Breathing activity will be measured by spirometry.
Interventions
None listed
Sponsors
University Hospital, Motol
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
20 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Signed informed consent form * Able to comply with the study protocol, in the investigator's judgment * Aged 20-40 years, inclusive * Healthy as determined by the Investigator based on medical history, physical examination, vital signs and neurological examination * Waist-to-height ratio \< 0,59
Exclusion criteria
* Low back pain (acute or chronic) * Previous abdominal or spine surgery * Acute or chronic respiratory or musculoskeletal disorder * Any clinically significant illness, medical/surgical procedure or trauma within 4 weeks before initiation of the study * Pregnancy
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Diaphragm movement | 6 months | Distance of the diaphragm from the ultrasound transducer in millimeters during tidal breathing, during holding a load, and during voluntary contraction of the trunk muscles |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Tidal volume | 6 months | Tidal volume in litres measured by spirometry during tidal breathing, during holding a load, and during voluntary contraction of the trunk muscles |
| Activity of the trunk muscles | 6 months | Relative pressure in kilopascals generated by the trunk muscles during tidal breathing, during holding a load, and during voluntary contraction of these muscles |
Countries
Czechia
Outcome results
None listed