Thibaut, you’re smart to ask. A sudden increase in running volume is a prime cause of injury. A safe guideline is no more than a 20% week-over-week increase. So, let’s look at the numbers in your plans:
– The IM L2 just had you peak at 4.5 hours of running, a peak which you hit several times in the L2 plan.
– That gives you a safe increase to 5.2 hours (20%) over your 4.5-hour peak.
– The final 4 weeks of the Marathon L2 plan has you peak at up to 6 hours, but all you would need to do is to take advantage of one of the cross-train options that week to bring your running down to 5.3 hours for the week. That’s close enough.
– I do recommend that you perform the RLMS in week 15 of the Marathon L2 plan, and the entire week 15 as written, which would be next week for you if you are completing the final 4 weeks of the plan.
David