A fitness challenge is a structured program designed to encourage individuals to improve their physical health and fitness levels. These challenges often include specific goals, such as increasing strength, endurance, or flexibility, and can last from a few weeks to several months. Participants may track their progress through various metrics, such as weight loss, exercise frequency, or performance improvements. Many fitness challenges are organized by gyms, community centers, or online platforms, allowing people to join as individuals or teams. Popular examples include 30-day workout challenges, step challenges, and weight loss competitions. These initiatives promote motivation, accountability, and a sense of community among participants.