A line graph showing 'Oxygen Uptake and Exercise Difficulty' is plotted between 'Exercise in watts' in x-axis with ranges from 0 to 400 with increments of 100 and 'oxygen uptake in liters per minute' in y-axis with ranges from 0 to 5 with increments of 1. The graph peaks between 300 to 400 with oxygen consumption between 4 and 5 liters.