Yea I have always been type of person who prefers learning by their own mistakes. I have never had the need to eat unless I’m hungry before so assumed I could manage hills not eating as I wasn’t hungry. Obviously now I realise I should have eaten as I felt better as soon as I did eat luckily. So yea next time I will have something to eat.
Will go to place near where I live which has few hills and steps to practice.