Final answer:
Henry should perform the bench press to improve strength in his chest muscles, an exercise that aligns with the specificity principle, which calls for targeted training to strengthen specific muscle groups.
Step-by-step explanation:
If Henry wants to improve strength in his chest muscles, he should engage in exercises that specifically target those muscles. This approach aligns with the specificity principle, which suggests that training should be relevant to the sport or activity one is training for, in this case, strengthening the chest muscles. A great example of an exercise that reflects the specificity principle for this goal is the bench press. The bench press directly targets the pectoral muscles, as well as the triceps and shoulders, and can significantly improve chest strength when practiced consistently and with progressively heavier weights, similar to how the biceps muscle can be strengthened by lifting heavy weights. Additionally, variation with incline or decline bench presses can further isolate different parts of the chest to enhance overall muscular development and strength.