Correct Response: B. According to the overload principle, a student must keep working harder using a systematic progression in the intensity of training activities to continue making gains in strength, endurance, and power. Gradual increases in the number of repetitions in muscular fitness training will result in greater endurance. Increasing the weight used in an exercise (A) will contribute primarily to gains in muscular strength. Decreasing the duration of rest intervals between exercises (C) or the length of time between training sessions (D) is more likely to impede muscle recovery and inhibit adaptations to training.
