Are carbs essential for high intensity training & performance?

A short video exploring whether carbs are essential for high intensity sport and training, and how people on keto or carnivore diets appear to defy the rules of sports nutrition. References mentioned in the video are listed below. 1. Burke, L.M., et al., Low carbohydrate, high fat diet impairs exercise economy and negates the performance benefit from intensified training in elite race walkers. J…