Calisthenics can help shed weight in the form of fat but is generally not effective at reaching absolute weight thresholds long-term. This is because Calisthenics replaces fat with muscle, and muscle tissue is heavier than fat. However, a body that is denser with muscles and leaner on fat is much healthier than a high fat percentage one. The goal of any weight loss plan should be to reduce your body fat percentage, rather than your weight.