Stronger Every Second: How Bill Castillo’s MRT Class Transforms Lives
At the Clyde Recreation Center in Springville, the music is loud, the energy is high, and the sweat is real — often due to Bill Castillo’s MRT (Metabolic Resistance Training) classes. MRT is a fast-paced class built around short bursts of intense exercise and quick recovery. It’s not your average gym routine, and trainer Bill […]
