Understanding Jumper's Knee Jumper's knee, or patellar tendinopathy, is a degenerative condition affecting the patellar tendon where it attaches to the bottom of the kneecap. The condition develops from repetitive loading during jumping, landing, and rapid direction changes. Pain localizes to the bottom of the kneecap and worsens with jumping activities. The condition progresses through stages from reactive tendinopathy (early, reversible) to tendon disrepair and finally degenerative tendinopathy (chronic). Early intervention produces better outcomes than waiting for advanced degeneration. Research from the British Journal of Sports Medicine shows that heavy slow resistance training and eccentric exercises are highly effective for patellar tendinopathy. Studies demonstrate that appropriate loading stimulates tendon healing and remodeling. Rest alone often worsens outcomes by allowing further deconditioning. (PubMed) Contributing Factors Training load: Rapid increases in jump volume or intensity without adequate adaptation time. Landing mechanics: Stiff landings without adequate knee flexion increase patellar tendon loading. Quadriceps strength: Weakness results in poor load distribution and increased tendon stress. Playing surface: Hard surfaces increase loading compared to sprung floors or grass. Start your 14-day free trial to access jumper's knee programs. Quadriceps Loading Exercises These exercises progressively load the quadriceps and patellar tendon. Knee Extension JME 171 Sitting in your chair, raise one leg up and in front of you. Then, bend at your knee to find 90 degrees and then return to a straight position. Leg Control JME 170 Find stability by holding onto the back of your chair or desk. Bend at your knee to raise your leg backward - as high as your are able to - and return to the floor. Seated Knee Work JME 168 Sitting in your chair, lift one leg up by bending at your knee. Be slow and controlled both on the raise and the decline to the floor. Standing Knee Bend JME 167 Sitting in your chair, extend one leg forward. Then, raise the leg straight up. After that, bend your leg at your knee to bring your knee as close to your chest as you can. Then return to the starting position. Hip and Ankle Support These exercises address the kinetic chain supporting knee function. Hip Abduction JME 125 Holding onto a wall or your chair, extend one leg to the side. Ankle Dorsiflexion JME 236 Place one foot slightly in front of the other. Then, push that knee as far as you can over your toes. Be controlled and only move as far as your joints will let you - don't force anything. Calf Raises JME 232 Starting flat on your feet, rise to stand on your toes. Fall back down to your flat feet and then stand on your heels. This movement should be fluid and stable. Hip Circles JME 144 For stability, hold onto your chair or desk with one hand. Follow the movement of your leg to the diagram very specifically. Ultimately, you are making a big circle with your knee. You want to be finding your end range of motion at each point. Be slow and controlled - this isn't a race. Find what works for your joints. Loading Principles Progressive loading: Tendons adapt to load, but progression must be gradual. Increase resistance by small increments weekly. Acceptable pain: Mild discomfort during exercise (3-4/10) is acceptable and may be necessary for adaptation. Sharp pain or significant worsening indicates excessive load. Isometric loading: Sustained holds (isometrics) can provide pain relief and begin loading during acute phases. Slow tempo: Heavy slow resistance with 3-4 second lowering phases loads the tendon effectively. Common Mistakes Complete rest: Avoiding all loading leads to further tendon weakening. Appropriate loading promotes healing. Stretching the tendon: Deep stretches pulling on the patellar tendon can worsen irritation. Focus on loading rather than stretching. Returning too quickly: Jumping too soon or progressing too fast leads to setbacks. Tendons adapt slowly. Injection dependence: Corticosteroid injections may provide short-term relief but can impair tendon healing. Activity Modification Reduce jump volume and intensity during rehabilitation. Substitute activities that load the tendon without impact, like cycling or swimming. Gradually reintroduce jumping as symptoms allow and strength improves. Return to Jumping Begin with low-intensity plyometrics: jumping rope, small hops. Progress to single-leg hops, then sport-specific jumps. Monitor symptoms and reduce if pain increases beyond acceptable levels. Full return typically takes 3-6 months depending on severity. Prevention Maintain quadriceps strength with regular training. Progress jump training gradually. Address landing mechanics. Allow adequate recovery between high-load sessions. These measures reduce recurrence risk. Start your 14-day free trial and fix jumper's knee with simplmobility.