What text book?
“Physiological Bases of Sports Performance,” Mark Hargreaves & John A. Hawley 2003
Chapter 8: “Nutrition for training and competition” which indicates that pre-exercise muscle glycogen stores determine capacity for prolonged exercise (backed by studies)
You’re right though mcook that carbohydrates are not required for health. On the contrary, VLCK (very low carbohydrate ketogenic) diets are very healthy and are how we evolved.
This article should be a sticky: “Metabolic Effects of the Very-Low-Carbohydrate Diets: Misunderstood “Villains” of Human Metabolism” http://www.jissn.com/content/1/2/7#B8
"…landmark study showed that a very-low-carbohydrate diet resulted in a significant reduction in fat mass and a concomitant increase in lean body mass in normal-weight men.
"…Contrary to popular belief, insulin is not needed for glucose uptake and utilization in man.
“…Finally, both muscle fat and carbohydrate burn in an amino acid flame.”
My recomendations to leave carbs are only when trying to add mass. if maintaining or cutting you should minimize or eliminate carbs. if performing in an athletic event down’t worry too much about carbs as you probably train multiple times per day.
Also when bulking multiple (2X) daily exercise sessions will minimize fat gain due to the carbohydrates by “teaching” your body to use carbohydrates as a fuel source rather than to store it.
Ever wonder why gymnasts, wrestlers, water polo players, track and field athletes are often ripped? it’s because they manage to avoid the typical conundrum of carbs by working out multiple times per day.[/quote]
I agree except that some people with higher metabolisms can probably stand to keep carbs in even while dieting, I don’t see the point of dropping them completely when you’re trying to conserve maximal muscle mass while losing weight as slowly as possible as the insulin producing effects are extremly valuable in that effort, not to mention giving you more energy to be more productive in the gym.