Question

select the correct answer. which component of exercise primarily strengthens your heart? a. flexibility b. strength training c. cardio d. resistance training

Explanation:

When you do cardio (cardiovascular) exercise, it makes your heart work harder. This helps to strengthen the heart muscle over time. Flexibility exercises mainly improve joint movement. Strength training and resistance training focus more on building muscle strength rather than primarily strengthening the heart. So, cardio is the component that primarily strengthens the heart.

Answer:

C. cardio