I'm so glad I took two weeks out after suffering from really painful knee . I have just finished a repeat of wk5 r3 but in the gym on the dreaded treadmill. I quite enjoyed it tbh. Stuck my music on and found a zone and stuck at it for twenty minutes quite happily. My knee just appreciates a softer landing at the moment. I would like to think I'll get outside again jogging as I think it's much harder outside in terms of wind resistance etc however if I can only use the gym then so be it. What do you all do?