Best fitness equipment The Jumping & Balance Trainer Sports Fitness Athletic Plyometric Soft Box ideal cardio & strength core trainer have to be in your home or commercial gym. The first feature in it its weight, is such light that makes it easier to move from one to other place. The fixed size is another feature that doesn't require much space to keep it. It is one but, you can use it for multiple purposes in your way, which makes it useable for all in your house whether each one has different exercise concerns.