The recommended amount of sleep for adults to support fitness is typically between 7 to 9 hours per night. Sufficient sleep is essential for recovery, muscle repair, and overall well-being. Inadequate sleep can impair athletic performance, concentration, and increase the risk of injuries. Additionally, quality sleep helps regulate hormones that control appetite, contributing to weight and health management. Adopting good sleep hygiene practices, like maintaining a consistent sleep schedule, is crucial for achieving these benefits.