Final answer:
During a traditional resistance training exercise, the external load is the factor that is held constant.
Step-by-step explanation:
In a traditional resistance training exercise, the factor that is typically held constant is the external load. The external load refers to the weight or resistance that is being used during the movement.
The speed of movement, range of motion, and mechanical advantage can vary depending on the exercise technique and specific goals of the training session.
However, the external load is usually set at the beginning of the exercise and remains unchanged throughout a set.