There is a reason why
Victoria Beckham went by Posh Spice in the Spice Girls, she is very posh. No matter what she is doing, she is always dressed like she is about to go to a NYC power meeting. Even when she is casual, she is still dressed better than you do when you get to a wedding.
But today, she was seen wearing a white tee, black sweatpants and sneakers. Why the sporty look? She teamed up with Reebok to design a line of clothes to empower women. This should be interesting and very fashionable like all of her other clothes.