Energy balance

Slower rates of body mass loss (approx. 0.5% per week) combined with longer diet durations result in a lower estimated energy deficit (EED) and higher energy availability compared to faster weight loss rates, thereby better preserving lean body mass in natural bodybuilders.

If you are a natural athlete preparing for a physique event, aim to lose no more than 0.5% of your body weight per week. This slower rate, often requiring a longer diet duration (e.g., 28+ weeks), helps maintain higher energy availability compared to faster 0.7-1.0% loss rates. This metabolic advantage is critical for preserving the lean muscle mass you have worked to build, as faster rates are associated with greater lean tissue loss.