You made it to the top. You take the pictures, drink some water, feel good about the climb. Then the trail turns and starts going down.
A few switchbacks in, your knees start to speak up. By the time you are halfway down, they are complaining loudly. By the time you reach the car, one knee has decided it is going to be sore for two days.
Every experienced hiker knows this pattern. Going up burns your lungs. Going down destroys your knees. Most people accept it as an unavoidable feature of the sport.
It is not. And once you understand why the descent is what actually hurts you, everything about how you prepare for hiking season changes.
Why the Way Down Loads the Knees So Much More
Walking on flat ground loads the knee joint at roughly one time body weight per step. Uphill walking increases that load moderately. Downhill walking on a moderate slope can produce knee joint forces up to six times higher than level walking, and downhill peak forces exceed uphill peak forces at the same gradient. This is not a small difference. It is the difference between what your knees do all day and what you are asking them to do on a switchback descent.
The reason is mechanical. When you climb, your muscles shorten under load. Your quadriceps contract to extend the knee. Your glutes contract to extend the hip. Your heart rate climbs, your breathing gets heavy, and you know your body is working. This is called concentric contraction, and it feels like effort.
When you descend, the same muscles have to lengthen while resisting your body weight plus gravity. Your quadriceps have to lengthen slowly and control the rate at which your body drops toward the next step. Your glutes have to do the same at the hip. This is called eccentric contraction, and it is a fundamentally different demand. If the muscle cannot control that lengthening, the knee absorbs the difference. Every step. All the way down the trail.
The uphill hiker is limited by cardiovascular capacity. The downhill hiker is limited by eccentric muscle control. Most people train the first without ever thinking about the second, which is why the descent is where the damage happens.
Why the First Big Hike of the Season Hits Harder Than It Should
For hikers who took a break during summer heat and return to the trails as the weather cools, there is a specific pattern that shows up in the first few weeks.
The strength work you did at the gym over the summer, if you did any, was almost entirely concentric. Lifting a weight. Pushing through a rep. Standing up from a squat. Even the exercises that felt hard were built around producing force, not absorbing it. Your body did not lose the capacity to produce force during the summer. It lost the capacity to control the lengthening phase of movement under load, because you had almost no opportunity to train it.
Then you head to the trail in October or November, tackle a familiar route, and your knees pay the price on the way down. Not because you got weaker in the traditional sense. Because the specific quality that protects your knees during descent went quietly untrained for months.
This is why hikers who feel strong at the gym still get hit by knee pain on the first big hike of the season. Gym strength and eccentric control on a steep descent are different capacities, and the body does not translate one into the other on its own.
What Is Actually Happening at the Knee on the Descent
Descent-related knee pain is not usually a single-cause problem. It is a stack of contributions arriving at the same joint at the same time.
- Quadriceps that cannot control eccentric lengthening well, forcing the knee joint to absorb load the muscle should have absorbed. This is the primary driver in most hikers.
- Glute weakness, particularly the gluteus medius and gluteus maximus along with the smaller external rotators, which are the main eccentric absorbers at the hip. Weak hips leave the knee doing hip work in addition to knee work.
- Ankle mobility limitations, which change how the foot lands and how much force reaches the knee with every downhill step.
- Foot mechanics that alter how load is distributed as your weight comes down through the leg. A foot that pronates excessively drives internal rotation of the leg, changing where load lands at the knee.
- Trunk control that has to keep the body upright on uneven terrain, particularly when a step is longer or lower than expected.
Notice how much of this list is not the knee. The knee is where the pain shows up because it is the middle joint in a chain managing the descent. Almost every driver of descent-related knee pain lives somewhere else in the body.
What to Do Before the First Big Hike of the Season
The good news is that eccentric control is highly trainable, and the specific work does not require a gym or specialized equipment.
Train the Descent Specifically
Slow, controlled step-downs from a stair are one of the most useful exercises for hiking preparation. Standing on a step, lower one leg slowly toward the ground over three or four seconds, then reverse. The slow lowering is where the eccentric work happens. Done regularly, this rebuilds the exact quality that summer strength work does not touch. Progression comes from adding time in the descent, adding a slight forward lean, or eventually adding a light weight.
Load the Glutes for Eccentric Control
Split squats, reverse lunges, and single-leg deadlifts train the glutes to control lengthening under load. Focus on the lowering phase of each rep. Descend slowly, feel the glute working on the way down, and reverse. This is where the difference between a knee that survives a descent and a knee that fails on one gets built.
Restore Ankle Mobility
Restricted ankle dorsiflexion changes how the foot handles the first moment of contact on a downhill step and pushes more work onto the knee. Simple ankle mobility work, done regularly, meaningfully changes what the ankle contributes to descent.
Build Progressive Elevation Into Your Return
If you have not been hiking regularly and the first hike of the season will be significant, start with shorter routes and less elevation change and build from there. The body adapts to descent demand through exposure. Jumping from summer sedentariness to a full descent on a familiar Scottsdale trail is asking the tissue to handle a load it has not seen in months.
When Descent Pain Warrants a Closer Look
If your knees have been giving you trouble on descents for multiple seasons, if the pain is limiting the trails you want to do, or if you have been avoiding downhill sections you used to handle comfortably, an assessment can identify what specifically is driving the pattern and what needs to change.
Descent-related knee pain that shows up hike after hike is not something to power through. It is a mechanical situation with specific drivers, and those drivers respond to specific work when they are correctly identified.
At DPT, a movement assessment looks at how your body is actually loading during the demands hiking places on it, including the eccentric control at your knees and hips, the mobility at your ankles, and the mechanics above and below the joint where the pain is showing up. Book a discovery visit with our team to find out what has been driving your descent pain and what it will take to change it before the season really gets going.
