2.) Belts must be of good quality. You donâ € ™ t want the belt to slip or stick while youâ € ™ re walking or running on a treadmill or worse fall apart altogether.
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3.) Bearings provides the majority. You donâ € ™ t want to hurt your back and joints from high impact exercise and good cushioning can greatly reduce the likelihood of damage to your back and joints caused by running and walking on your treadmill.