Mixed
Short-term fat adaptation (5-6 days of high-fat diet followed by carbohydrate restoration) increases fat oxidation and spares muscle glycogen during submaximal exercise but does not improve performance in prolonged endurance events.
Do not use a high-fat diet followed by carb loading to try to improve your race time. While this strategy successfully teaches your body to burn more fat and save glycogen, it does not make you faster or help you finish endurance events sooner. Stick to standard carbohydrate strategies for performance.
fat-adaptation/CHO restoration strategies do not provide clear benefits to the performance of prolonged endurance exercise.
Why this rating
Based on a review of multiple controlled studies (Tables 1-3) with consistent findings on metabolism, though performance results are mixed/null.
Source
Effects of short-term fat adaptation on metabolism and performance of prolonged exercise
Louise M. Burke et al. · Medicine & Science in Sports & Exercise · 2002
DOI 10.1097/00005768-200209000-00015
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →