Arm-in-Arm Gait Training Trial

Inclusion Criteria: 1. Older Participant * Older than 70 years old * Able to walk continuously during 15 minutes without walking aids. * Must have experienced a fall during the last year before the recruitment. * Health certificate that attests no contraindication to walking * No severe gait disorders from orthopedic or neurologic origins (such as lower-limb amputation or severe hemiparesis). Mild gait abnormalities (for example, mild limping due to knee arthritis, or slight gait asymmetry due to limited hemiparesis) will be tolerated. 2. Younger Participant * Older than 18 years old but younger than 40 years old. * No severe gait disorders from musculoskeletal or neurologic origin. Exclusion Criteria: * Inability to follow the procedures of the study, e.g., due to language problems, psychological disorders, dementia, etc.; * Inability or contraindications to undergo the investigated intervention. * Vulnerable persons, in sense of swiss Human Research Act art. 21-24.