Question

question 30: in which activity would your slow - twitch muscle fibers be used?
☐marathon
☐1 pullup
☐40 yard dash
☐max bench rep
question 31: when creating a plan to improve flexibility, if you begin with stretching 3 days a week and work up to stretching daily, you have applied this training concept to your workout
○strength
○progression
○endurance
○intensity

Explanation:

Question 30

Slow - twitch muscle fibers are used for endurance - based activities as they are fatigue - resistant. A marathon is a long - distance running event that requires sustained effort over a long period, which relies on slow - twitch muscle fibers. Pull - ups, 40 - yard dash, and max bench rep are more related to strength or short - burst (fast - twitch muscle fibers) activities.

The training principle of progression means gradually increasing the intensity, duration, or frequency of exercise over time. When improving flexibility, starting with stretching 3 days a week and working up to daily stretching is a form of gradually increasing the frequency of the stretching exercise, which applies the progression principle. Strength is about muscle force, endurance is about sustaining activity, and intensity is about the level of effort, and they don't fit this scenario of increasing the frequency of stretching.

Answer:

Marathon

Question 31