Studying the Effects of the X10D Shoe on Walking in Healthy Adults Aged 50 to 65

Inclusion Criteria: The inclusion criteria are: * Healthy subjects aged 50-65 years * Ability to walk at minimum 30 minutes at a regular pace without assistance or breaks * Written informed consent as documented by signature (see informed consent form) Exclusion Criteria:The exclusion criteria are: * Women who are pregnant or breast feeding * Current neurological problems affecting walking function and balance * Current orthopedic problems affecting upper and lower extremity movements * History of alcohol abuse or the intake of psychotropic drugs * History of major cardiac condition (e.g., infarction, insufficiency (NYHA II-IV)) * History of major pulmonary condition (e.g., chronic obstructive pulmonary disease (GOLD II-IV)) * Current major depression or psychosis * Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia * Fever of unknown origin