yeah, 156 on a flat out 5k is defintiely on the low side, especially since when you race the cadence should end up slightly higher. I haven't raced a 5k but my track work and 10k races end up closer to 190SPM.
I wudln't beat yourself up over it, but slowly increasing your cadence to more like 170 will mostly liekly help with any knee issues and you might end up running a little faster.
I wudln't beat yourself up over it, but slowly increasing your cadence to more like 170 will mostly liekly help with any knee issues and you might end up running a little faster.