… Senior Center. Leidis Santana Diaz, BSN '24, and Caitlin Prescott, OTD '26, show Marjorie Delorey how to use a treadmill at the Chelsea Senior Center. Assisting at … a treadmill, sitting bicycle, and a weight pulley tower. It was the first time Marjorie Delorey, a spry 95-year-old, had been on a treadmill. “It felt like the … Senior Center. Leidis Santana Diaz, BSN '24, and Caitlin Prescott, OTD '26, show Marjorie Delorey how to use a treadmill at the Chelsea Senior Center. Assisting at …