Brands should review fit, inseam, liner comfort, waistband pressure, pocket position, fabric stretch, fabric recovery, anti-chafe seams, logo placement, and movement performance. A training shorts sample should be tested through squats, lunges, running, sitting, stretching, and phone pocket use if storage is part of the design. Clear sample feedback should identify the exact issue, such as liner ride-up, pocket bounce, waistband rolling, tight leg opening, or fabric that does not recover well after movement.