It is generally believed that the sports level and endurance of a professional athlete at the age of 45 are significantly lower than those at the age of 30. but the result of a marathon between retired and serving professional footballers was that there was no difference between 45-year-old retired footballers and 30-year-old serving players. 
Retired players do not hesitate to risk exceeding their physical strength in the game in order to prove their strength
 it is wrong to think that the sports level and endurance of a professional player will be significantly reduced by the age of 45.