Asymmetric Movement of the Diaphragm

The Effect of Asymmetric Postural Loading on the Movement of the Right Hemidiaphragm

The aim of this study is to investigate the movement of the right hemidiaphragm when lifting a load with the left and right hand.

Hemidiaphragm movement will be assessed by m-mode ultrasonography in a standing position. The study will include 30-40 healthy adult volunteers. The examination will consist of two tidal inspirations and expirations, two inspirations and expirations during lifting the kettlebell with the left hand and two inspirations and expirations during lifting the kettlebell with the right hand. The weight of the kettlebell will correspond to about 10% of the participant's body weight.

Inclusion Criteria:

• Signed informed consent form
• Able to comply with the study protocol, in the investigator's judgment
• Aged 18-40 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