Yeap BB, et al. – Researchers investigated the impact of physical activity (PA) 25-hydroxyvitamin D (25-OH-D) status on metabolic syndrome (MetS) risk in adults in this study involving 4,858 adults (mean±SD age: 58.0 ± 5.8 years; BMI: 28.1 ± 4.8 kg/m²) in Western Australia. A U-shaped relationship of vigorous PA with MetS risk was identified in men with low lean mass. Low PA and lean mass were linked to MetS risk in women. According to findings, men and women with elevated lean mass, irrespective of PA, have low MetS risk. Furthermore, 25-OH-D and PA do not interact on MetS risk.