Final answer:
The statement 'Low tolerance= fast gainer' is context-dependent, but regarding muscle fibers, individuals have varying proportions of slow-twitch and fast-twitch muscle fibers, which is why the claim that all people have the same proportion is false.
Step-by-step explanation:
The statement 'Low tolerance= fast gainer' can be true or false depending on the context in which it is used. However, in relation to muscle fibers and gaining muscle, there is a common misconception that is hinted at in the second question provided: True or False. All people have the same proportion of slow-twitch to fast-twitch muscle fibers. The answer to this is False. Individuals have varying proportions of slow-twitch and fast-twitch muscle fibers, which affect their muscle endurance and strength performance abilities. Those with a higher proportion of fast-twitch fibers are often able to gain muscle and strength quickly but may fatigue faster during endurance activities. Conversely, individuals with more slow-twitch fibers typically excel in endurance sports and may take longer to see muscle gains from strength training.