Final answer:
When comparing cycle ergometry to treadmill testing, one can expect a lower percentage of maximal oxygen consumption because of regional muscle fatigue. Varying levels of fatigue during exercise can be attributed to factors such as energy supply and oxygen delivery, and endurance or resistance training can have specific cellular adaptations.
Step-by-step explanation:
During cycle ergometry, due to regional muscle fatigue, one can expect a lower percentage of maximal oxygen consumption when compared to treadmill testing. This is because cycle ergometry primarily utilizes the leg muscles, and local muscle fatigue can limit performance before reaching the maximal capacity of the cardiovascular system to deliver oxygen. In contrast, treadmill testing involves more muscle groups, which helps delay local muscle fatigue, allowing for a closer approach to true maximal oxygen consumption.
Fatigue is influenced by various factors, including energy availability, oxygen delivery, perception of pain, and psychological factors. Endurance training affects the cellular structure by increasing the number of capillaries, mitochondria, and myoglobin, particularly benefiting those with a higher proportion of slow-twitch muscle fibers, resulting in increased oxygen carrying capacity and aerobic activity endurance. In resistance training, there are increases in muscle size and strength, typically more pronounced in individuals with more fast-twitch fibers.
Lactate levels can affect muscle performance but are not the sole contributor to muscle fatigue. Also, anaerobic activity efficiency can improve with training, which might mitigate some of the fatigue experienced during activities like cycle ergometry.