Limit periods of continuous caloric deficit to a maximum of 12 weeks with a weight loss rate of 0.8% per week, followed by a stabilization period of equivalent duration to preserve muscle mass and metabolism.

noli's read

The proposed weight loss rate of 0.8% per week is solidly validated by sports nutrition science. A meta-analysis of randomized controlled trials (Ashtary-Larky et al., 2020) confirms that gradual weight reduction (ideally between 0.5% and 1% per week) preserves muscle mass and resting metabolism significantly better than rapid weight loss. Regarding the 12-week limit followed by a stabilization break of equal duration (the Renaissance Periodization protocol), this is a very pragmatic expert opinion in sports physiology, but not an absolute biological rule. Indeed, a meta-analysis of clinical trials (Poon et al., 2024) shows that incorporating stabilization breaks does not provide a direct superior gain in muscle mass compared to a continuous deficit of the same cumulative duration. However, this same study shows that these breaks cut the decline in resting metabolism in half and reduce mental fatigue. Thus, this protocol offers a very useful organizational framework for long-term adherence, even if the 1:1 stabilization ratio is more of a field recommendation than a rigid scientific requirement.

the sources

1. 1Hall KD, Heymsfield SB, Kemnitz JW, et al. 2012
2. 2Rolls BJ 2009
3. 3thefitness.wiki