Intermittent Dieting: Theoretical Considerations for the Athlete

Area of Science:

• Sports Nutrition
• Human Physiology
• Body Composition Management

Background:

• Athletes commonly use continuous energy restriction (CER) for pre-competition weight and fat loss.
• Intermittent energy restriction (IER), involving cycles of energy deficit and refeeds, is proposed as a potentially superior alternative.
• IER may mitigate adaptive thermogenesis and hormonal changes that hinder sustained weight loss.

Purpose of the Study:

• To review the theoretical basis for using IER in athletic populations for body composition adjustment.
• To examine the limited evidence supporting IER's effectiveness in athletes.
• To provide practical considerations for applying IER in athletic practice.

Main Methods:

• This is a review article, synthesizing existing theoretical frameworks and empirical evidence.
• It critically analyzes the potential mechanisms by which IER might enhance fat loss.
• The review discusses the applicability of findings from non-athletic populations to athletes.

Main Results:

• Theoretical models suggest IER can attenuate metabolic adaptation more effectively than CER.
• Evidence specifically for IER in athletic populations is currently limited but warrants further investigation.
• Refeed periods in IER may temporarily restore energy balance, potentially aiding adherence and metabolic function.

Conclusions:

• IER presents a promising, yet under-researched, strategy for athletic body composition management.
• Further research is needed to validate IER's efficacy and optimal implementation in athletes.
• Practitioners should cautiously apply IER principles based on current theoretical understanding and limited data.