The sharper insight: strength is what stops the late-ride leg fade
Everyone loves talking watts and FTP. But the real difference is holding them when it gets ugly, which is why fatigue resistance matters so much, especially for indoor riders.
Fresh legs make everyone look like a hero. Tired legs show you what you’ve actually got. Hips drop, knees drift, cadence gets slower and messy, and suddenly the same effort feels harder than it should.
Strength raises your baseline, so your normal riding costs less. That’s why strength training improves performance even when the workouts themselves are short. You’re not just getting stronger, you’re staying the best version of “you” for longer.
If you’ve ever watched your watts fall off a cliff while your brain insists you’re trying, you have met fatigue resistance. It’s not dramatic. It is just brutally honest.

How often cyclists should train legs
For most riders, one or two leg sessions per week is the sweet spot. It’s enough to build strength and robustness without leaving you too tired to ride well.
If you’re new to strength work, start with one session weekly for a few weeks. If you recover well and your riding quality stays high, add a second session. If your legs feel like they have been replaced with damp sandbags, stay at one and tidy up your execution and recovery. You want it to help your riding, not wreck it.

Leg workouts for beginners vs advanced riders
The difference is not exercise choice. It is execution and progression.
Beginners should keep it simple, chase good positions and posture, move smoothly, and stop a couple of reps before form falls apart. More advanced riders can progress by adding load gradually, increasing time under tension, and leaning into single-leg work.
If you’re unsure what “good” feels like, use this test: you should finish the session feeling like you did useful work, not like you need a nap.
Combining leg workouts with cycling training
The easiest way to fit it in is to keep it away from your hardest rides. Place leg sessions on easy or moderate ride days, and avoid heavy leg work in the 24 to 48 hours before your hardest interval session. If you only ride three times per week, one leg session can still fit, provided it is sensible and consistent.
This is where indoor training makes life easier. When your riding sessions have a clear purpose, it becomes easier to place strength training so it supports, rather than torpedoes, your week. You want your best legs on the days that matter, not on the day you accidentally tried to “just see what happens” with Bulgarian split squats.
Personally, on occasion, I include short strength sessions after an indoor ride simply because I’m more motivated and already well warmed up.
Strength training as part of an indoor routine
Indoor riding is consistent, which is great and also why it can niggle you. Leg workouts add movement variety, strengthen supportive tissues, and help you stay stable when fatigue builds.
A simple indoor-friendly setup is one short leg session after an easier indoor ride, plus another session on a non-riding day or paired with a very light spin. The key is that the strength work should leave you feeling solid, not shattered.