Answer:
The overload principle can be utilized by:
a. using heavier weights and increasing the duration of the exercise
Step-by-step explanation:
The overload principle in exercise states that in order to make improvements and progress, the body must be subjected to a workload that is greater than what it is accustomed to. This can be achieved by increasing the intensity, duration, or frequency of the exercise. Option (a) correctly represents the utilization of the overload principle by suggesting the use of heavier weights, which increases the intensity, as well as increasing the duration of the exercise. By combining both heavier weights and longer durations, the body is challenged to adapt and grow stronger.