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Showing posts with the label glycogen

Are you effectively carb loading?

Over the past 50 years, a significant amount of research has shown the important role of glycogen for delaying fatigue in athletes competing in endurance and ultra endurance events. Glycogen is the storage form of carbohydrates. In humans, small amounts of glycogen are also found in tissues and cells, like the kidneys, red blood cells and brain. Glycogen is primarily stored primarily in the cells of the liver (~100g) and skeletal muscle (~500g). Skeletal muscles transform chemical energy to mechanical work. Glycogen is the body's predominant source of energy during moderate to high intensity activity. The depletion of muscle glycogen during endurance activity causes early fatigue.  Dietary carbohydrates are converted to glucose - the main source of energy for the body and brain. For the non-diabetic population, when you eat a carb-rich meal, your blood glucose will rise. Increased blood glucose signals the pancreas to produce insulin - a very important hormone that helps the body c

Is fat burning undermining your performance?

Source The media loves to make nutrition simple. Workout fasted and you burn more fat. If only it was this simple.  When it comes to the physiology of the body during exercise, nutrition is a complex topic. Researchers are still studying the different effects of nutrients, nutrient timing and supplements on exercise and exercise performance. This isn't to say that fat burning doesn't work (it does!) but it's not as simple as not eating carbohydrates before and during a workout.  There's a lot of debate about fasted training, training low, LCHF diets, keto and low carb. Unfortunately, with no middle ground, athletes tend to direct their energy and attention to what's most trendy and popular and for the past few years, carbohydrates have received a bad reputation from the media.  I am a proponent of carbohydrates in the diet. I feel strongly for nutrient timing (eating before/after workouts) and I believe that the use of sport nutrition is critical in optimizing healt