Study: NCT04819724

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: 3D motion analysis
Description: 30° arm abduction in the scapular plane will be performed with and without a handheld weight of 1, 2, 3, and 4 kg. All movements will be done bilaterally. Electromyographic (EMG) data of arm and trunk muscles will be recorded using surface electrodes. Participants will be asked to perform full arm abduction with different rotations (internal, neutral and external rotation), flexion and internal-/external rotations movements (without additional handheld weight).

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: 3D motion analysis
Description: 30° arm abduction in the scapular plane will be performed with and without a handheld weight of 1, 2, 3, and 4 kg. All movements will be done bilaterally. Electromyographic (EMG) data of arm and trunk muscles will be recorded using surface electrodes. Participants will be asked to perform full arm abduction with different rotations (internal, neutral and external rotation), flexion and internal-/external rotations movements (without additional handheld weight).

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: 3D motion analysis
Description: 30° arm abduction in the scapular plane will be performed with and without a handheld weight of 1, 2, 3, and 4 kg. All movements will be done bilaterally. Electromyographic (EMG) data of arm and trunk muscles will be recorded using surface electrodes. Participants will be asked to perform full arm abduction with different rotations (internal, neutral and external rotation), flexion and internal-/external rotations movements (without additional handheld weight).

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: isometric shoulder strength by dynamometer
Description: isometric shoulder strength for abduction and internal/external rotation will be assessed with a isometric shoulder strength for abduction and internal/external rotation will be assessed with a dynamometer

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: isometric shoulder strength by dynamometer
Description: isometric shoulder strength for abduction and internal/external rotation will be assessed with a isometric shoulder strength for abduction and internal/external rotation will be assessed with a dynamometer

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: isometric shoulder strength by dynamometer
Description: isometric shoulder strength for abduction and internal/external rotation will be assessed with a isometric shoulder strength for abduction and internal/external rotation will be assessed with a dynamometer

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: fluoroscopic images of each shoulder
Description: fluoroscopic images (Multitom Rax, Siemens Healthineers, Erlangen, Germany) of each shoulder will be taken during the 30° arm abduction test with and without a handheld weight (0, 2, and 4kg)

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: fluoroscopic images of each shoulder
Description: fluoroscopic images (Multitom Rax, Siemens Healthineers, Erlangen, Germany) of each shoulder will be taken during the 30° arm abduction test with and without a handheld weight (0, 2, and 4kg)

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: fluoroscopic images of each shoulder
Description: fluoroscopic images (Multitom Rax, Siemens Healthineers, Erlangen, Germany) of each shoulder will be taken during the 30° arm abduction test with and without a handheld weight (0, 2, and 4kg)

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: Bilateral shoulder Magnetic Resonance Imaging (MRI)
Description: MRI of both shoulders will be taken

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: Bilateral shoulder Magnetic Resonance Imaging (MRI)
Description: MRI of both shoulders will be taken

Intervention type: DIAGNOSTIC_TEST
Group type: OTHER
Intervention: Bilateral shoulder Magnetic Resonance Imaging (MRI)
Description: MRI of both shoulders will be taken

Intervention type: OTHER
Group type: OTHER
Intervention: data collection by health questionnaires
Description: data collection by health questionnaires

Intervention type: OTHER
Group type: OTHER
Intervention: data collection by health questionnaires
Description: data collection by health questionnaires

Intervention type: OTHER
Group type: OTHER
Intervention: data collection by health questionnaires
Description: data collection by health questionnaires