In 40 seconds
Hyrox's sled push station produces some of the highest knee loading in athletic training — particularly for taller athletes whose stride bends the knee deeper under heavy load. Patellofemoral irritation is common. PEMF therapy reduces patellar inflammation and supports cartilage health. Combined with quad/glute strengthening, it lets you keep training through a Hyrox prep block.
Quick facts
- Hyrox station: Sled push (~50m) and sled pull
- Common knee issue: Patellofemoral pain (runner's knee variant)
- PEMF role: Reduces inflammation, supports cartilage
- Pairs with: Quad and glute strengthening, technique work
- Realistic: Don't push through severe pain
Why this injury happens in this sport
The sled push loads the knee at deep flexion under heavy resistance. Repeated training with poor mechanics or insufficient quad strength irritates the patella.
Recovery and return to sport
Reduce sled volume by 30–50% during a flare. PEMF 2–3× per week. Quad strengthening (split squats, leg press, goblet squats) and glute work build the resilience needed for full Hyrox training.
Contraindications
Standard PEMF contraindications: pacemakers, defibrillators, cochlear implants, insulin pumps, electronic implants; active malignancy without specialist clearance; pregnancy (over the abdomen); active infection; epilepsy without GP clearance.
Frequently asked questions
Is Hyrox bad for my knees?
Not inherently — but volume and technique matter. Most knee issues are over-volume + under-strength.
Should I lose weight on the sled?
Reduce weight during recovery, not technique. Light heavy reps with good positions > heavy reps with broken positions.
Looking for a PEMF clinic near you?
We list every credible PEMF therapy provider in the UK so you can find one near home.