 This study examined the effects of a 16-week physical activity program on older adults' anthropometric parameters and physical fitness. The results showed that the participants experienced significant reductions in their waist circumference, body mass index, and waist-to-height ratio, as well as improvements in physical functioning. Additionally, these changes were independent of the participants' baseline nutritional status. This article was authored by Pablo Valdez Badia, Eduardo Guzmán Muñoz, Rodrigo Ramírez Campillo, and others.