Brands should confirm inseam length, leg opening, side split, liner length, and how the shorts should fit during squats, running, lifting, and daily movement. A shorter inseam may work better for running or high-mobility training, while a mid-length inseam is often easier for gym and hybrid activewear use. The inseam should also match the brand's target market, styling direction, pocket layout, and whether the product is designed as a standalone short or part of a training capsule.