Our expert says:
Hi there Joe.
Your headaches could be due to a number of reasons.
The first may be dehydration. Do you drink enough fluids during the day and on the court? You should drink approximately 1.5 to 2 litres during the day and more during tennis depending on your sweat rate.
Another reason may be a drop in blood glucose levels. Exercising for 3 to 4 hours can deplete your glycogen stores which can cause a drop in blood glucose levels during tennis. This may manifest as headaches after tennis. To avoid a drop in blood glucose levels, make sure you eat something light and carbohydrate based before tennis e.g. toast with avo, crackers with cottage cheese, fruit and yoghurt etc) and take something similar on the court e.g. Banana's are great, you could dilute fruit juice (half juice and half water), dry crackers, cereal bars etc. Be careful of over eating and drinking too much juice.
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