This is an amazing new Exercise / Sports Improvement / Cardio and Ab workout machine from Rebound Galaxy ...For male and female teenagers and adults ! Parents don't worry ...The Rebound Trainer uses their own very safe, light , soft and spongy 2.5 pound medicine ball......But there are varying weights and professional athletes can use the heavier balls for an extreme workout ......This machine can do so much !...There is no other machine like it .....Go to the website www.reboundgalaxy.com - and see the many workouts you can get ....Personal Trainers, Athletes and even Teenagers can get very creative with this machine ....SEE FOR YOURSELF!