Question

which statement about anaerobic exercises is true?
a. you should leave at least a day between anaerobic exercises to let muscles rest and heal.
b. anaerobic exercise should last longer and be more intense than aerobic exercise.
c. during anaerobic exercise the muscles require a lot of oxygen.
d. anaerobic exercise is mostly intended to improve cardiorespiratory endurance.

Explanation:

• Option A: Anaerobic exercises like weight - lifting cause micro - tears in muscle fibers. Muscles need time (at least a day) to repair and grow stronger, so leaving a day between anaerobic exercises for muscle rest and healing is a valid practice.
• Option B: Anaerobic exercises are short - burst (e.g., a 10 - second sprint or a set of 8 - 12 weight - lifting repetitions) and intense, while aerobic exercises (like a 30 - minute jog) are longer - duration. So, anaerobic exercise does not last longer than aerobic exercise.
• Option C: Anaerobic exercise occurs in the absence (or near - absence) of oxygen. Aerobic exercise is the type where muscles require a lot of oxygen.
• Option D: Aerobic exercise (such as running, cycling) is mainly for improving cardiorespiratory endurance. Anaerobic exercise is more for building muscle strength, power, and increasing muscle mass.

Answer:

A. You should leave at least a day between anaerobic exercises to let muscles rest and heal.