AFAA Personal Trainer Certification Practice Exam

Which type of resistance training matches the external resistance to the exerciser's strength curve?

1. Static Variable Resistance

2. Dynamic Variable Resistance

3. Dynamic Constant Resistance

4. Progressive Resistance Exercise

The correct answer is: Dynamic Variable Resistance

Dynamic Variable Resistance training is designed to match the external resistance to the exerciser's strength curve, which means that the resistance level can change throughout the range of motion. This type of training utilizes equipment that dynamically alters the load based on the position of the joint and the strength curve of the muscle being worked. In this approach, the resistance is relatively easy during the weakest parts of the muscle’s range of motion and progressively increases as the muscle approaches its strongest position, thereby allowing for a more efficient and effective workout. This training method enables individuals to lift heavier loads while minimizing the risk of injury, as it accommodates the natural variations in strength during different phases of an exercise. Other forms of resistance training do not adjust the external load in relation to the strength curve in the same way. Static Variable Resistance focuses on maintaining a constant load, while Dynamic Constant Resistance provides a consistent weight throughout the whole motion, not accounting for strength variations. Progressive Resistance Exercise entails systematically increasing the resistance over time, but it doesn't specifically adjust to the strength curve during a single workout session. Therefore, Dynamic Variable Resistance is the most suitable option for aligning resistance with the exerciser's strength curve.