I’m looking for some advice and real-world experiences on returning to structured training after being sick.
This season I’ve had several short illnesses, mostly brought home by my young child. What I’ve noticed repeatedly is that once I start feeling better, my plan often resumes with relatively hard workouts — for example VO2max or anaerobic sessions — and those can feel disproportionately hard compared to how “ready” I appear on paper.
A recent example: after a few days with lower HRV, slightly elevated resting/night HR and mild symptoms, I started feeling much better again. Sleep, resting HR, breathing rate and SpO₂ were back in range, and I did an easy endurance ride around IF 0.46 / TSS 43, which felt controlled. However, my HR still seemed about 5–10 bpm higher than when I’m fully fresh and healthy.
My concern is that jumping back into high-intensity work too soon may be causing setbacks or at least making the return harder than necessary.
How do you handle this in TrainerRoad?
Do you:
pause the plan completely during illness?
replace the first few workouts with Endurance/Recovery?
use Workout Alternates and pick much lower-level workouts?
wait for HRV/resting HR to normalize?
avoid VO2max/anaerobic work for a certain number of days?
follow TrainNow instead of the scheduled plan?
manually reduce FTP or intensity temporarily?
I’m especially interested in how others distinguish between “I’m healthy enough for easy endurance” and “I’m ready for intensity again.”
This is not meant as criticism of TR — I’m mainly trying to build a better return-to-training protocol so I don’t repeat the same mistake after every illness.
Do you actively mark this sick days in your calendar? This should already trigger upcoming workouts to change to some extent (more endurance, less intensity). Beyond that, be sure to answer the post workout survey correctly. This will also cause adaptations to make live easier for a little while
Thanks — yes, I do actively mark sick days in the calendar and I also answer the post-workout surveys as accurately as possible.
That’s actually part of my question: even when I mark the illness and let the plan adapt, the return to harder intensity sometimes still feels too aggressive for me personally.
It may be that the plan does reduce the load “on paper”, but I’m finding that there is a big difference between being ready for easy endurance and being ready for VO2max or anaerobic work again.
So I’m curious how others handle that specific transition. Do you trust the adapted plan as-is, or do you manually add a few extra days of endurance/recovery before returning to intensity?
Personally, I tend to suffer through it. Normally it only takes a few workouts for fitness and TR to align again. If a workout is way to hard, I abort it with „intensity" as reason and maybe to some endurance to cover the time. But even those scenarios only happen once or twice before fitness and adaptations catch up with each other again.
Of course that’s only for short interruptions, like 2-3 days. Anything beyond a week, and I’d cancel the plan, only do endurance for a while, until the body feels good again, and then maybe do a bit of TrainNow for overall fitness evaluation before beginning another plan.
I think this is exactly the distinction I’m trying to understand better: for very short interruptions, maybe the plan and body can realign after a few workouts. But when there are repeated illness episodes, I’m finding that the first high-intensity sessions can feel disproportionately hard, even when easy endurance already feels fine again.
Your point about aborting with “intensity” as the reason and replacing it with endurance makes sense. I may need to be more disciplined with that instead of trying to force the scheduled workout.
For me, the key takeaway is probably: being ready for endurance is not the same as being ready for VO2max/anaerobic work again.
I’d recommend easing back into things however you need to.
Using Workout Alternates, or the AI workout tool, can help you get some easier workouts in place until you’re feeling completely healthy. If you’re still feeling fatigue or lingering symptoms from your illness, jumping back into hard workouts isn’t going to get you anywhere quickly.
That makes sense — I think the key point for me is not just whether I can complete an easier endurance ride, but whether I’m actually completely healthy enough to return to intensity.
I’ll use Workout Alternates / the AI workout tool more conservatively after illness and probably keep the first few sessions as Endurance or Recovery before adding harder work again.
Listen closely to your body for signs that might signify you’re not fully recovered.
Also, if you ever start a hard workout and just aren’t feeling well, you can always turn down the intensity or bail entirely.
Pushing through a workout that feels harder than it should isn’t super productive, so you’re probably doing yourself a favor to change things up in those scenarios.
Yeah. IDK if it’s changed recently, but AFAIK TR AI does not take into consideration the reason for time off, only that there was time off. It doesn’t matter which reason you select. It adapts for the time off as if you’re perfectly healthy, not as if you have some lingering debilitation from being sick. So, like at any time during a plan if I’m not feeling up to it, I modify as makes sense and allow AI to adapt going forward.
