Grade: 3
First noticed 5km into an ultra, ran through to 26km and then retired. 7 weeks 5 days off, first 2 weeks mimimal weight bearing. 3 weeks in back on bike.
Trying to run long distances on hard packed trail with no long distance running for a month. Also still just getting into running so probably just a build up of 6 months of intensive training without a running base training/fitness