Health is a big part of what tennis players find attractive about the sport. Running parallel to that is the idea that you can give yourself an edge on the court with healthy habits.
New technology sometimes helps in this regard but old fashioned things like home remedies and simple use of basic foods and herbs. Another concept is the use of a natural balance of bacteria in the digestive system and even on the skin that strengthens the immune system.
Here is a story of a scientist who took his experiment personally. If successful he expects to gain better health and longer life. I can't say I'd try this particular approach but the idea that in general there are many unknowns that can improve your health and this includes microorganisms. Digestive bacteria is already one area that appears to improve a person's immune system that may have been damaged by antibiotic use or illness.
Proven foods that help in this may include any foods that introduce and replace gut bacteria.
Here is an interesting article on ways to introduce good bacteria into your digestive system.
