How do I add mileage on the Katy Trail without getting injured?

Raise your weekly volume by only about ten percent, then hold it a week or two before climbing again, and take a lighter deload week every third or fourth week. Change one thing at a time — don't add a longer long-run, faster paces, and more days all in the same week. Because the Katy Trail is flat and uninterrupted, deliberately vary your pace and mix in some road, grass, or rolling terrain so the same stride isn't repeated thousands of times without a break.

Why do my knees hurt after long runs on flat trails?

Flat, uninterrupted paths like the Katy don't force you to slow down, so the pace and distance quietly creep up faster than your tissues can adapt. Pain around or under the kneecap — runner's knee — is the classic result of that mileage jump, usually driven by weak hips letting the knee cave inward on each landing. Strengthening the hips and glutes and backing off the load for a week or two typically settles it.

What strength exercises prevent running injuries?

The highest-value work is heavy, slow calf raises, single-leg exercises, and hip and glute strengthening — two or three short sessions a week. Strong hips keep the knee tracking cleanly, and resilient calves protect the Achilles when mileage climbs. This does far more to prevent injury than stretching, and it's the core of the Corrective Exercise Programming we build for runners.

When should I see a chiropractor versus a doctor for running pain?

See a physician promptly for pain that makes you limp, swelling after a specific incident, night pain, numbness, or sharp bony tenderness in one small spot, which can signal a stress fracture needing imaging. For the recurring overuse pain that comes back every time you add miles — sore knees, Achilles, IT band, or hips — a sports chiropractor can assess the whole hip-to-heel chain and build a plan that raises your tissue tolerance. We work alongside your physician and physical therapist, not around them.

Athletic Performance 7 min read August 16, 2026

Running the Katy Trail without wrecking your knees, Achilles, or hips.

St. Charles County's flattest miles are also the easiest place to overdo it. Here's how to add Katy Trail distance without irritating your knees, Achilles, or hips.

Dr. Hailey Andersen

DC · Founder, The Spine Studio

Somewhere around mile eight on the Katy Trail, the miles stop feeling like work. The crushed-limestone surface is forgiving, the grade is famously flat, and the path just keeps going — so the pace creeps up and the distance stretches a little further than you planned. That is exactly how most running injuries begin: not from one bad step, but from a little too much, a little too soon. Runners call it “too much too soon”; in the clinic we call it a training-load error, and it is the single most common thread behind the sore knees, cranky heels, and achy hips we see every fall in St. Charles County.

Why do my knees and Achilles hurt when I add miles?

Fitness and tissue tolerance improve on two different clocks. Your heart and lungs respond to training in a matter of weeks, which is why the running starts to feel easy fast. Tendons, cartilage, and bone adapt far more slowly — over months — so when weekly mileage jumps, the engine is ready long before the chassis is.

That mismatch shows up in a few predictable places. Pain around or under the kneecap — what runners call “runner’s knee,” and clinicians call patellofemoral pain — is the classic mileage-jump complaint. So is a stiff, tender cord at the back of the heel, the early form of Achilles tendinitis. On the outside of the knee it may be IT band syndrome; under the heel and arch, it can be the first pull of plantar fasciitis.

None of these are freak accidents. They are the slowest-adapting tissue telling you the load outran its timeline.

How much should I increase my running mileage each week?

The practical guideline most coaches use is to raise weekly volume by roughly ten percent, then hold that number for a week or two before climbing again. It is not a magic law — it is a governor. It keeps the jump small enough that tendon and bone have time to catch up.

Two habits matter more than the exact percentage. First, build in a lighter “deload” week every third or fourth week, where you cut volume back and let the tissue consolidate. Second, do not stack a longer long-run, faster paces, and more total days in the same week — change one variable at a time.

This is where the fall calendar bites. Runners training for the MO’ Cowbell in St. Charles often start the real mileage ramp in late summer, which means August and September are when the load curve gets steep. A goal race is a great reason to run more; it is a terrible reason to skip the ramp math.

Your heart and lungs adapt in weeks, but tendons, cartilage, and bone take months. Train for the slowest tissue, not the fastest one.

Why flat, easy trails like the Katy make it worse

The Katy Trail is one of the best places in the region to run, and that is precisely why it can set a trap. It starts right at the St. Charles trailhead and rolls out in long, uninterrupted, dead-flat stretches with no hills to force a slowdown and no intersections to make you stop. On a road, traffic lights and grade changes break up the effort for you. On the Katy, nothing does — so the pace quietly creeps up and the same stride repeats thousands of times without variation.

Repetition without variation is what overloads tissue. The fix is not to avoid the trail; it is to add the variety the trail leaves out. Rotate in some road or grass miles, throw in gentle rolling terrain, and vary your pace deliberately instead of letting the flat set it for you. Monotony of load is a risk factor you can control.

Which muscles keep runners injury-free?

Running is a single-leg sport — every stride is a small landing absorbed by one leg. The muscles that decide whether the knee, heel, and hip survive that landing are mostly upstream of where it hurts. Two groups do the heavy lifting.

The hips and glutes. Weak or lazy hip muscles let the knee cave inward on landing, which is a direct driver of runner’s knee and IT band pain. Strength here controls the joint two levels down.
The calves. The calf and Achilles absorb and return a large share of each stride. Calves that can handle load make the heel far more resilient when mileage climbs.
Single-leg control. Because you never run on two legs at once, balance and control on one leg translate directly to smoother, safer strides.

Two or three short strength sessions a week — heavy, slow calf raises, single-leg work, and hip strengthening — do more to prevent injury than any amount of stretching. This is the backbone of the rehab and corrective work we program for runners: Corrective Exercise Programming built around the specific tissue that needs to catch up.

Runners — Cottleville & St. Charles

A quick gait and strength screen finds the weak link before the trail does. Our sports chiropractic assessment pairs Precision Spinal Adjustments and Pin & Stretch with a corrective plan matched to your mileage goal — so the ramp toward your fall race is built on tissue that can take it.

How do I recover between long runs?

Adaptation happens during recovery, not during the run. The single most powerful recovery tool is sleep, followed closely by simply spacing hard efforts — a genuinely easy day after a long run is training, not slacking. Back-to-back hard days are where sore tissue turns into injured tissue.

Soft-tissue work has a place here too. Pin & Stretch and Cupping & Scraping can settle a calf or hip that is holding tension while you keep training, but they are a complement to load management, not a substitute for it. No amount of hands-on work outruns a training week that is too aggressive.

When should I see someone about running pain?

Most early aches settle with a lighter week and a little strength work. See a physician promptly, though, for pain that makes you limp, swelling or bruising after a specific incident, night pain, numbness, or a sharp bony tenderness in one small spot — that last one can signal a stress fracture and needs imaging, not a foam roller.

For the persistent overuse pain that keeps returning every time you add miles, that is our lane. We work alongside your physician and physical therapist, not around them — assessing the whole chain from hip to heel, then building the corrective plan that actually raises your tissue tolerance. For stubborn tendon problems that have not budged, Shockwave Therapy is offered as a $375 three-session package, the minimum recommended course to drive tissue repair — we cover the details in our piece on Achilles tendinopathy and shockwave.

A first visit is a 40-minute assessment for $149; follow-ups are $60. Dr. Andersen, DC, will map the plan to your race calendar, not the other way around.

Runners — Katy Trail, St. Charles County

Ramping mileage for the fall? Get the weak link found before it sidelines you.

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Frequently asked questions

How do I add mileage on the Katy Trail without getting injured?: Raise your weekly volume by only about ten percent, then hold it a week or two before climbing again, and take a lighter deload week every third or fourth week. Change one thing at a time — don't add a longer long-run, faster paces, and more days all in the same week. Because the Katy Trail is flat and uninterrupted, deliberately vary your pace and mix in some road, grass, or rolling terrain so the same stride isn't repeated thousands of times without a break.
Why do my knees hurt after long runs on flat trails?: Flat, uninterrupted paths like the Katy don't force you to slow down, so the pace and distance quietly creep up faster than your tissues can adapt. Pain around or under the kneecap — runner's knee — is the classic result of that mileage jump, usually driven by weak hips letting the knee cave inward on each landing. Strengthening the hips and glutes and backing off the load for a week or two typically settles it.
What strength exercises prevent running injuries?: The highest-value work is heavy, slow calf raises, single-leg exercises, and hip and glute strengthening — two or three short sessions a week. Strong hips keep the knee tracking cleanly, and resilient calves protect the Achilles when mileage climbs. This does far more to prevent injury than stretching, and it's the core of the Corrective Exercise Programming we build for runners.
When should I see a chiropractor versus a doctor for running pain?: See a physician promptly for pain that makes you limp, swelling after a specific incident, night pain, numbness, or sharp bony tenderness in one small spot, which can signal a stress fracture needing imaging. For the recurring overuse pain that comes back every time you add miles — sore knees, Achilles, IT band, or hips — a sports chiropractor can assess the whole hip-to-heel chain and build a plan that raises your tissue tolerance. We work alongside your physician and physical therapist, not around them.