Here are the answers you chose (in pink), and my comments about your answers (in blue). If you didn't answer all of the questions correctly, you might want to click Previous to try them again. Would you want to increase or decrease Michael's lacate levels during performance?       You chose answer .       No. The higher the lactate levels during performance, the greater the fatigue. This fatigue will lead to a decrement in performance. Would the goal be to increase or decrease Michael's VO2max?       You chose answer .       No, that wouldn't be the goal for Mike. Athletes who increase their maximum capacity will find that their aerobic endurance improves. You'll want to help Mike increase his VO2max. Would you want Michael to increase or decrease his VO2 at a submaximal intensity?       You chose answer .       No. Running economy is the ability to perform an activity with the least amount of energy. Training Mike to use less energy while running at a certain pace simply means that he'll be able to maintain a faster pace during his performance for the same pre-training amount of energy. This improvement in economy reflects better mechanics and hopefully improved performance during a competition. Finally, would you want Michael to be able to increase or decrease his body's carbohydrate use at a specific running speed?       You chose answer .       No. Remember that glycogen stores are limited, and running low on glycogen will lead to fatigue. There goes the race! Being able to conserve glycogen by using more fat instead of carbohydrate (glycogen) is an important training goal for an aerobic endurance athlete.