When hiking and trail running enthusiasts experience a dull or sharp pain in their knees during descents, it should never be taken lightly. This signal sent by the joints often masks complex mechanisms related to muscular effort and knee biomechanics. A better understanding of this pain can make all the difference between continuing to enjoy your mountain outings without discomfort and risking these sensations developing into more serious injuries. Here, we’ll delve into the secrets of knee pain on descents, discuss common causes, tips for relieving it, and above all, how to prevent its onset through targeted preparation.
Why do knees suffer so much on descents during hiking or trail running? Understanding the mechanisms
Have you ever wondered why the simple act of descending a mountain trail puts so much strain on your knees? It’s actually a matter of the forces exerted in this specific area. On descents, the knee is subjected to much higher stress than when walking or running on flat terrain, sometimes up to three or four times greater. This amplification of stress is mainly explained by the need for your muscles, especially the quadriceps, to brake the flexion of the knee in a controlled manner, a process called eccentric contraction.
This eccentric contraction, often underestimated, acts as a kind of muscular brake, slowing down movement. Imagine your muscle contracting and lengthening; this action creates significant tension. If the quadriceps are not prepared for this type of effort, they tire quickly, leaving the joint less protected. This dysfunction puts more stress on the kneecap and surrounding structures such as tendons and cartilage, which can lead to irritation and, inevitably, pain. This is exacerbated by the incline: the steeper the descent, the greater the force exerted on the knee.
- Several initial causes can therefore be identified that explain this pain: Lack of muscular preparation: Eccentric contraction is specific and rarely practiced uphill or on flat terrain, which prematurely fatigues the muscles on descents.
- Joint instability due to muscle weakness, particularly in the quadriceps, but also in the gluteal and calf muscles, which play an essential stabilizing role. Poor technique: strides that are too long or postural imbalances increase the load on the joint.
- Accumulated general fatigue: in the mountains, long climbs wear down the muscles that then have to absorb the impact on the descent. Muscular and tendon stiffness: which limits the flexibility needed for fluid movements.
- Excess weight: which adds considerable weight to support and slow down on the descent. This combination ultimately creates an environment conducive to pain, which manifests in several forms, as we will now examine. Common knee pathologies and pain among downhill walkers and runners: When experiencing knee pain that occurs primarily on descents, it is important to know that it can stem from various mechanisms or diseases.
- Here is an overview of the most common conditions: Patellofemoral pain syndrome (or patellar syndrome): This is the most classic condition, where pain is felt around the kneecap, often on the front of the knee. This situation corresponds to misalignment or excessive friction between the kneecap and the femur.
- Iliotibial band syndrome (ITBS): The pain is located on the outside of the knee. It is often caused by inflammation of the iliotibial band tendon, which rubs against the femoral condyle. This syndrome particularly affects runners who regularly perform downhill runs with improper technique. Meniscal tears: These can cause sharp pain on the inside or outside of the knee, often associated with a feeling of locking or instability. Repetitive impacts during downhill running can aggravate these problems. Knee osteoarthritis: Generally more common in older athletes, the pain is diffuse and worsens during activity, especially downhill where the pressure on the cartilage is significantly increased. Cartilage wear limits the knee’s shock absorption capacity.
In addition, during these uphill and downhill runs, your quadriceps are often the first to suffer. Intense strain, fatigue, and micro-tears in the muscles all contribute to soreness that can last for several days. Muscle atrophy during these episodes also indicates the urgent need to strengthen these specific muscle groups. The pain felt downhill is therefore indicative of an imbalance between the load placed on the joint and your muscles’ ability to absorb and manage it effectively.
How to effectively relieve knee pain after a downhill run? What to do
When pain strikes, whether it’s throbbing or persistent, there are several ways to soothe your knees and prevent this discomfort from becoming chronic.
- Here are some key tips to try: Alternate your pace and rhythm
- when descending: walking and jogging with shorter strides reduces the load on your knees. Take regular breaks
- to avoid tiring your muscles and joints too quickly. Streen your quadriceps regularly
- to loosen the area and reduce muscle stiffness. Use trekking poles
which distribute the load and reduce pressure on your knees.
Keep your torso slightly forward
to better distribute your body weight and avoid excessive strain on your knees.
Avoid excessively steep slopes,
or moderate your speed on these sections. Joint support such as a strap or knee brace (for example, from brands like GenouZen or GenouProtect) can also provide additional support while maintaining mobility.
- Lighten your load as much as possible by choosing lightweight and suitable equipment. Applying a specific gel such as Artrogel or SoulageFlex can provide targeted soothing relief.
- If pain develops, the goal is to limit its intensity to less than 5 on a scale of 10 to prevent it from worsening. Prevention also involves following these guidelines during your outings. Taking care of your knees after your outing: rest, recovery, and beneficial practices. Proper post-exercise recovery is an integral part of preventing chronic knee pain. Here are the best practices to apply as soon as your outing is over: Complete or partial rest,
- stop walking and running downhill until the pain disappears. Apply ice 3 times a day, especially if the knee is swollen, to reduce inflammation.
- Massage your muscles and especially your quadriceps as soon as muscle pain appears, to promote blood circulation and reduce tension.
- Gentle and regular stretching adapted to your muscles and joints.
- Low-impact activities such as swimming or cycling allow for movement without stressing the knees. Avoid excessive self-medication with anti-inflammatories or painkillers without medical advice, which can mask important signs.
- If your pain persists or worsens, a medical evaluation is essential. Solutions such as physiotherapy with KinéSolution may then prove necessary to complement appropriate treatment. Preventing knee pain on descents: the secret to staying in shape for longer Prevention is the best weapon against bothersome knee pain, especially in the mountains. To limit the risks, it is essential to prepare your body in a targeted way:Specific warm-ups before each outing to prepare the muscles and tendons for exertion. Regular muscle-strengthening exercises
- particularly targeting the quadriceps, glutes, back, and ankles. Programs including squats, lunges, core exercises, and proprioception are recommended. Plyometric training
- (jumps and agility) to improve power and muscle responsiveness, thus limiting premature fatigue. Frequent stretching to promote joint and muscle flexibility through dedicated sessions several times a week. Monitoring shoe wear : replace your shoes as soon as the cushioning or grip is compromised.
Hydration and a balanced diet
to maintain good recovery and protect your joints.
Using specialized aids
- such as PainStop
- , FlexiSanté
- , or MobiGenoux
- to support and stabilize fragile knees on a daily basis. Managing body weight
- To reduce the strain on your knees during exercise. Adopt a suitable technique
- when descending: short strides, slightly bent torso, and proper diaphragmatic breathing.
Finally, remember that hiking poles are invaluable for relieving pressure on your joints throughout your outing. They contribute to better weight distribution and reduce the impact on your knees. Applying these tips regularly and diligently will allow you to better enjoy your hikes and trail runs, without fearing your knees will betray you on the descent.
