30s

Women in their 30s face specific hormonal and lifestyle factors affecting weight management: early perimenopause signs, PCOS, career and family stress, and reduced lean mass. This article reviews what the evidence shows about optimising weight loss in this life stage.

Metabolic rate in the 30s does not decline dramatically — the primary driver of metabolic slowdown is lean mass loss from reduced physical activity, not age itself. RMR declines approximately 1–2% per decade after 30. Resistance training (Peterson 2011: +1.1 kg lean mass) and protein adequacy (1.6g/kg/day) are the most evidence-supported approaches for the 30s. This article covers what actually changes and what works.