Which of these is most likely to lead someone to increase his or her level of physical activity?

What region is located between the shoulder blades

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If you were running a marathon, which type of muscle fibers would be most useful to you? a. slow-twitch b. fast-twitch, type i a c. intermediate-twitch, type ii b d. slow-intermediate twitch, type i b select the best answer from the choices provided. a b c d