Final answer:
Greater OBLA level improves fitness by enhancing endurance and reducing fatigue. This improved response to exercise is affected by muscle fiber composition and can be heightened through appropriate training and recovery.
Step-by-step explanation:
Having a greater Onset of Blood Lactate Accumulation (OBLA) level contributes to fitness by Improved endurance and reduced fatigue. During intense exercise, elevated levels of lactate and other metabolic changes occur in the muscle, which can lead to fatigue. However, with training, the anaerobic exercise's effectiveness can be enhanced, which means the body can better handle lactate accumulation, delaying fatigue and improving endurance.
There are differences in how individuals respond to physical exercise, which may be influenced by the proportion of slow-twitch and fast-twitch muscle fibers. People with a higher proportion of slow-twitch fibers, which can sustain aerobic activity longer, might have greater endurance and thus could benefit more from aerobic exercise. Conversely, individuals with more fast-twitch fibers may develop greater muscle size and strength from anaerobic exercise but may not have the same endurance capacity.
It is important to note that overworking the muscles with extremely intense exercise without proper rest can lead to adverse effects such as delayed onset muscle soreness (DOMS). Therefore, appropriate training and recovery are essential for improving fitness and endurance levels.