The first player of the team

Hearing He Feng's words, Reuben Su couldn't help but smile brightly.
He was very satisfied with He Feng's answer.
Then, he said, "Who said you don't have the strength you once had? Didn't I just say that I can improve your abilities?"
Hearing this, He Feng's face froze, and he asked in surprise: "Boss Su, how do you improve my abilities?"
He was very confused.
You know, he is 40 years old now, and his physical functions have declined. His explosive power and endurance are not...