Exercise equipment can be heavy and stressful on the joints in which case exercises that utilize the body’s own weight as a form of resistance can be used instead. Sports such as swimming allow the level of difficulty to be managed according to the individual’s style and weight. Endurance and stamina based sports are ideally suited for children and the elderly for whom equipment are not recommended. Developing muscles and toning the body can be difficult without particular equipment however over long periods of use, activities such as swimming can tone and develop the body to an athletic level. Natural exercises are known to have positive effects without aggravating or accelerating any physiological conditions. Pilates and yoga are additional exercises that are ideal for individuals searching an equipment-free workout.