The 2019-2020 season has seen a significant increase in football players' fatigue, leading to numerous injuries and setbacks. This phenomenon is primarily attributed to factors such as long hours of training, poor nutrition, lack of sleep, and overtraining.

In round 4 of the Premier League, teams faced a particularly challenging situation with their players suffering from fatigue. The key measures taken by clubs to recover these players were as follows:

1. Early Rest Periods: Clubs prioritized rest periods for their injured players. They started their games earlier than usual to give them adequate time to recover. This was done to prevent any further damage to their bodies.

2. Nutrition: Clubs provided their injured players with high-quality food to ensure they had enough energy to perform at their best. They also ensured that they received proper hydration to prevent dehydration.

3. Sleep: Clubs ensured that their injured players got sufficient sleep during their recovery period. This included providing them with comfortable sleeping environments and ensuring that they had enough rest periods between games.

4. Physical Training: Clubs also emphasized physical training to help their injured players recover faster. They focused on strengthening their muscles and improving their agility to prevent any further damage to their bodies.

5. Medical Attention: Clubs provided medical attention to their injured players to ensure that they were getting the necessary treatment to prevent further complications.

In conclusion, the key measures taken by clubs to recover injured players during round 4 of the Premier League were crucial in helping to prevent any further injuries and setbacks. By prioritizing rest periods, providing quality food and hydration, ensuring adequate sleep, conducting regular physical training, and providing medical attention, clubs were able to help their injured players recover quickly and prevent any further setbacks.