Outdoor exercise has several benefits over working out at a gym according to a provided article. It argues that exercising outdoors makes it more likely people will stick to a routine long term, it makes people happier by reducing stress and boosting endorphins, and it leads to quicker results through increased wind resistance and targeting of multiple muscles at once. Additionally, outdoor exercise is more affordable as gym memberships can cost hundreds per year while access to nature areas is often less than $50 annually. The article concludes that outdoor exercise provides essential vitamin D from sunlight that supports health in multiple ways.