Birch Wood Gymnastic Rings with Adjustable Straps – Strength & Calisthenics TrainingBirch Wood Gymnastic Rings with Adjustable Straps Strength & Calisthenics Training Build your core strength and tone your upper body to perfection. Gymnastic rings activate your muscles in a coordinated way. The flexibility of gym straps allow you to focus on specific areas. This means you can develop the muscle mass and definition you want. Combining push ups, pull ups, dips, rows, muscle ups and chest flies on gymnastic rings will improve fitness