For example, a cross-country skier who skls continuously for two hours during a training exercise will need result, which of the following pathways would be best suited to this type of activity? of ATP. As a short bursts O Using creatine phosphate O Oxidative phosphorylation O Glycolysis a sustained source To prepare for the cross-country meet, a skier decides to significantly increase the amount of carbohydrates in his diet (a technique also known as carbohydrate loading). Why might this be beneficial to the cross-country skler? Check all that apply. O Eating more carbohydrates leads to more glycogen stores in muscles, which then equates to larger energy stores for short, explosive bouts of energy use. O Carbohydrates are used to build actin filaments in the myofibrils, which increases muscle bulk and performance, O The liver can store copious amounts of ingested carbohydrates as glycoger, which can then be wowly broken down to release the guese needed to fuel aerobic respiration O As long as oxygen is present, the glucose stored in the ingested carbohydrates can brovide a steady stream of ATP, thus meeting the demands of prolonged periods of exercise