Waking up at the middle of the night is a problem I have whenever I start training for a marathon. I no longer consider it a sleeping problem but an effect of marathon training.
For the last two months since i started training for October Nairobi Marathon, every night my sleep is interrupted, it is usually a case of a full bladder. After emptying it I get back to bed and get back sleeping within no time.
Waking up at night is a good sign for a runner.
The full bladder that wakes me up at night is because of my hydration. To run properly a runner must drink plenty of water to remain hydrated. I always make sure am drinking a minimum of two litres a day to replace lost fluid during running.
While it is inconveniecing to wake up in the middle of the night, I think it is a small price to pay. The most important thing for me is to run properly and that means staying hydrated.
Waking up at night is a sign my hydration is up to standard.