Why Your Knee Pain Might Be Your Saddle Height
Updated: Aug 27
Most cyclists and triathletes treat position and injury as separate problems. They're usually the same problem.
If you turn the pedals 5,000 times an hour, a saddle that's a centimetre too high isn't a minor annoyance, it's five thousand slightly wrong repetitions, every hour, all season. That's how overuse injuries are actually made.
What position problems tend to look like
There are recognizable patterns between where it hurts and what's off on the bike:
Pain at the front of the knee — often a saddle that's too low or too far forward.
Pain behind the knee or in the hamstring — often a saddle that's too high or too far back.
Outside-of-knee and IT band pain — commonly cleat rotation and saddle height.
Achilles pain — often foot position on the pedal.
Low back pain — usually reach, saddle position, or how you're rotating through the hips.
Neck pain — excessive extension, reach too long, bars too low.
Numb hands — too much weight through the hands, reach too long, frame too big.
None of that means the pattern is automatically the answer for you, it means these are questions worth asking before you accept that your knee is just "a bad knee."
Why a fit from a physical therapist is a different thing
A standard bike fit adjusts the bike to the rider. That's useful. But it assumes the rider's body is a fixed input.
It usually isn't. Limited hip rotation, tight hamstrings, an old ankle injury, one leg genuinely longer than the other, these are the reasons a position "doesn't work," and a fitter who can't assess them has to compensate around them without knowing they're there.
Assessing the body and the bike in the same session means the position gets built around what your body can actually do, and the mobility work that would let you hold a better position comes home with you.
Set the engine first, then make it aerodynamic
The order matters. You make the bike go with your legs, not your arms, so the priority is establishing the lower body in its most effective position to apply power. Only then do you modify the upper body toward a more aerodynamic profile.
For triathletes chasing an aggressive aero position, some compensation is normal, up and forward at the saddle and the less flexible you are, the more compensating there is to do. But starting from a fixed upper-body position constrains your ability to produce power, and no amount of aerodynamics makes up for an engine you've folded in half.
When it's worth doing
You have a recurring niggle that shows up only on the bike
You've bought a new bike, changed cranks, or switched shoes or cleats
You're moving from road to TT, or racing your first triathlon on aerobars
You can't hold your aero position for more than 20 minutes without your back complaining
You've never had one
What we do at Rival PT
Bike Fitting and Triathlon Screening — 90 minutes, $350. Road and TT. It combines a full bike fit with a total-body screening for triathlon readiness, and you leave with exercises, mobility work, and race preparation guidance specific to what we found.
As far as I'm aware, it's the only physical-therapist-led bike fitting service in Bergen County.
Want this handled properly?
If something hurts only when you ride, that is a position problem until proven otherwise. Book a fit and let's find out which.
Dr. Mike Blanco, PT, DPT, Cert. DN — USAT Level 1 Certified Coach. Rival Physical Therapy, 681 Lawlins Road, Unit 110, Wyckoff, NJ. Call or text 201-220-9049.
This article is general education, not a diagnosis or individual medical advice. If pain is severe, worsening, or present at rest, get assessed in person.
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