For effective muscle mass enhancement, engaging in long-lasting and consistent increased physical activity is essential. This approach allows muscles to adapt and grow more effectively than sporadic or short-term efforts. Therefore, option b is the best choice.
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The question is about the type of physical activity that best enhances muscle mass. Muscle mass enhancement is often linked to exercises that are both consistent and challenging enough to stimulate muscle growth. Let's evaluate each option to find the best claim:
Long lasting high intensity physical activity (Option a): This type of activity involves sustained efforts at a high level of exertion. While effective for endurance, it might not be the ideal choice for muscle mass, which is often built with specific resistance training.
Long lasting, not sporadic, increased physical activity (Option b): This suggests continuous activity that is consistently performed over time. Regular, sustained, and progressively challenging exercises like weightlifting are known to increase muscle mass. Thus, this seems like a strong contender.
Long lasting activity (Option c): Simply lasting long doesn't necessarily translate to muscle mass enhancement unless it specifically involves resistance or strength training.
High intensity physical activity performed at least once a week (Option d): While high intensity is valuable, performing the activity just once a week might not provide the consistent stimulus needed for muscle building.
Long lasting, not sporadic, increased or decreased physical activity (Option e): This is a broad and vague description that doesn't clearly point to muscle mass enhancement strategies, as fluctuations aren't ideal for consistent muscle growth.
Considering these points, the best claim for muscle mass enhancement among the options provided is (b) Long lasting, not sporadic, increased physical activity, as it highlights consistency and gradual increase, both key factors in building muscle mass.