Done my 2nd 10k today. Had to walk an extra 3 k to get to the leisure centre, so 13 k in all. But while doing the 10 k, I still resulted in the same time. I'm getting tired really easily. Had a good breakfast. Drunk so much I felt water logged. So ending up at doing it in 1.20 this time. Just wondering if there is anything to build up my stamina and endurance so I can get it in better time, or will that come over time with training?