You can do it many ways, but I would keep the mileage 6-8 weeks with down weeks or so, before increasing again. If you change the training too soon, your body doesnÂ´t have enough time to fully adapt and stabilize to the new mileage. Increasing volume too much --> going to catabolic state and maybe getting injured, the body has itÂ´s ways to tell you that this is too much. Just enough to shake the homeostasis, stabilize it by staying there long enough before changing training again. I recommend to google "orthostatic test" and consider it to monitor the state of your autonomic nervous system. This done every morning helps you to decide is your body ready for high volume/intense day on that day. An example of a mesocycle, two to three weeks working phase (shaking homeostasis), 1 recovery week (supercompensation). The mileage in the working phase from about 30% to no more than 50% higher than in the recovery phase. Play it safe and wise. If the recovery phase is too short, and you arenÂ´t recovered, you miss reaching a full supercompensation and can end up overreaching/overtraining etc. The second mesocycle at the same stress level is important to fully stabilize to the new volume. ThatÂ´s why the 6-8 weeks before changing the training again. Some literature says that 4-6 weeks is enough but I think that you shouldnÂ´t rush it, especially when training at level where you havenÂ´t never been.