Question

The energy to sustain intense physical activity is provided mostly by

Answer 1

the answer should be carbohydrates

Answer 2

Carbohydrates

Step-by-step explanation:

In intense, long-lasting physical activity, the body often uses a balanced blend of fat and carbohydrates (at a higher rate).

The more intense the activity becomes, the more and more muscles tend to use carbohydrate as fuel because it has a faster metabolism. However, they have limited stock (muscle glycogen).