Prospective Longitudinal Multicentric Study to Evaluate Syde® Digital Endpoints in Healthy Adults

Inclusion Criteria: * Male or female aged between 18 and 65 years old * Signed informed consent * Subjects with a reported BMI ≥ 17 and ≤ 35 * Subject with unlimited internet connection at home and authorizing automatic data upload * Subject willing and able to comply with all study procedures including: * baseline data and questionnaires data entry on EDC (electronic data capture) throughout the study * Syde® related procedures * Subject confirming to be affiliated to, or beneficiary from, a social security category Exclusion Criteria: * Elite athletes (at a national level) * Pregnant women * Presence of an orthopedic, neuromuscular, or neurological pathology affecting walking gait quality or requiring a walking aid * Subjects reporting to have an incapacity or invalidity or to be affected by a chronic disease which can affect their activity and/or their lower limb function * Subjects reporting to have undergone recent surgical procedures, trauma (within 6 months), or affected by a disease or condition affecting lower limb function within 3 weeks before their inclusion