Hi @DRT! There are various rates of decay in fitness, where from an absolute peak of fitness you might see a 2-3% decrease in Anaerobic Capacity with just a week of complete de-training, to the potential of a 2-3% increase in MAP and FTP with 2-4 days completely off. Generally speaking for FTP and MAP to decline, you’d need about 10-days of near complete rest to see a demonstrable decrease in either of those two values. Performing 2 reduced training sessions per week for 3-4 weeks would tend to preserve your current level of fitness in those areas with little drop. Of course, there are variations depending on how fit you are when you take a break, but generally speaking a week or two of complete rest from training (but not being bed-ridden) is a healthy part of any annual training schedule. If you have a more extended period of time with limited training, you’d be better off keeping one quality/high intensity session a week than just keeping everything easy or moderate. As a general rule, we usually expect rebuilding fitness to take about 2-4X at long as it takes to lose it, assuming you’re healthy and training with purpose and progression. Hope that helps!