Fatigue and Kinematics During Isometric Activity of the Upper Limbs in Young and Older Adults

실험적: Isometric activity

All participants will be included in this arm

다른: Isometric activity

Participants will do elevation of upper limbs and mantain a 90º degree flexion position in an unsupported way.

다른 이름들:

• Isometric task

Change from Baseline in perceived effort on the Borg category-ratio 10-point scale (CR 10)

The perceived effort will be measured with Borg CR 10 scale. Possible scores range from 0 (no exertion at all) to 10 (extremely strong).

Change from Baseline in heart rate

Heart rate (heart beatings per minute) measured before and during activity to track cardiovascular changes during activity.

Change from Baseline in respiratory rate

Respiratory rate (respiratory cycles per minute) measured before and during activity to track changes in respiratory function during activity.

Change from Baseline in heart rate variability (HRV)

Interval (in milliseconds) between consecutive heartbeats measured before and during activity to track changes in autonomic function during activity.

Change from Baseline in electrodermal activity (EDA)

Electrical conductance (in microsiemens -µS) between two points of the hand over time measured before and during activity to track changes in autonomic function during activity.

Change from Baseline in muscle action potential amplitude through surface electromyography (sEMG)

Muscle action potential amplitude (in millivolts - ms) in surface electromyographic signal measured before and during activity to track muscular fatigue signs.

Change from Baseline in muscle action potential duration through surface electromyography (sEMG)

Muscle action potential duration (in milliseconds - ms) in surface electromyographic signal measured before and during activity to track muscular fatigue signs.

Change from Baseline in muscle action potential frequency through surface electromyography (sEMG)

Muscle action potential frequency (in hertz - Hz) of surface electromyographic signal measured before and during activity to track muscular fatigue signs.

Change from Baseline in respiratory pattern through inertial motion units (IMU) from baseline and during activity

Angular range of motion (in degrees) of rib cage and abdominal wall during upper limb activity measured before and during activity to track changes in respiratory pattern during activity

Change from Baseline in upper limb motion angular acceleration through inertial motion units (IMU) system

Angular acceleration (in m/s^2) of the arm measured before and during activity to track small movements of upper limb during isometric activity

Health Status

Health Status will be measured with Medical Outcomes Study (MOS) Short Form Health Survey 36 Item version 2 which measure health status of populations and individuals. Possible scores range from 0 0 (worst health status) to 100 (best health status).

Physical activity level

Physical activity level will be measured using European Prospective Investigation into Cancer and Nutrition Physical Activity Questionnaire (EPIC-PAQ) that allows to estimate energy expenditure through self-report assessment of the intensity and average duration (per day, week and month) of physical activity performed by the participants in three distinct dimensions (professional, domestic and leisure).

Participants are classified as ACTIVE if they perform: at least 150 minutes per week of moderate physical activity; OR at least 75 minutes per week of vigorous physical activity; OR at least 150 minutes per week of a combination of moderate-intensity activity. If they don't present any of the conditions described, they will be categorized as SEDENTARY.