You may have seen the old “Packman” mat used for introducing backward handsprings to beginners.
OK for Rec. But these mats have been criticized by many coaches. The technique is not ideal as the knees and hips are too bent.
Norbert’s has made a huge leap forward with their newest trainer:
Unique “single flat side” design ensures Boulderâ„¢ is stable at starting position and always automatically returns to it after eash use. …
Three sizes available: 35″ Small Boulderâ„¢ (users up to 60″ tall), 40″ Medium Boulderâ„¢ (users from 60″-66″ tall) or 44″ Large Boulderâ„¢ (users 67″ or taller).
Looks weird, right? But check the video to see how well it works. AWESOME.
Gymnastics Coaching.com 