Final answer:
The bench press exercise exemplifies an isotonic contraction, where muscles maintain consistent tension while moving a constant load through the full range of motion.
Step-by-step explanation:
The bench press exercise using free weights would be an example of an isotonic contraction. In the realm of fitness and exercise physiology, isotonic contractions occur when a muscle maintains the same tension as it shortens or lengthens while lifting a constant load through the full range of motion. The bench press is a classic example, as the pectoral, deltoid, and tricep muscles contract to push the weight away from the body and then lengthen to return the weight to the starting position.