Question

Why are slow-twitch muscles more beneficial than fast-twitch muscles for cardiorespiratory fitness?

Answer 1

Answer:

Slow twitch fiber use oxygen at a slow rate than do fast twitch fibers.

Explanation:

Slow twitch fibers use oxygen slowly and can maintain work for a long peroid of time.  Therefore, they are used for cardiovascular activities, or activities that require sustained supply of oxygen.  Running a marathon or swimming a long distance would be examples of exercise that use slow twitch fibers.  These are aerobic (with oxygen) activities.

On the other hand, activities that cannot be sustained for a long period of time due to the immediate and fast use of oxygen are called anaerobic (without oxygen).  Sprinting and jumping in place are explosive activities that rely on fast twitch fibers and a fast supply of oxygen.

Answer 2

Answer:

Slow-twitch muscles are able to use oxygen more efficiently than fast-twitch muscles.

Explanation:

Hope it helps! :P