William and Kate are in serious need of some Lululemon ... because they look ridiculous in their business attire as they peddle furiously at a fitness center.
The Prince and Princess hit up the Aberavon Leisure & Fitness Centre for a worthy purpose -- showing how exercise can benefit mental health.
That said, they both hopped on bikes during a spinning class and showed what they got ... for a grand total of 45 seconds. They both looked like they were going to pass out.
Kate was dressed in a jumper and skirt, choosing heels over tennis shoes.