Why exercise rather than rest
Rest reduces pain because it removes the demand. It also reduces the knee's tolerance, so returning to a full training week produces the same problem, often worse. Progressive loading works in the opposite direction: it keeps demand within what the growth plate can currently handle while raising that ceiling week by week.
This is not a set of stretches to do for a fortnight. It is three to four months of structured strength work, alongside a training week that has been adjusted rather than cancelled.
Phase 1: settle it and hold strength
Aim for isometrics that are demanding but keep pain at or below about 3 out of 10, and that leave the knee no worse the following morning. Most athletes spend one to two weeks here.
- Wall sit: knees around 60 degrees, hold 30 to 45 seconds, 4 to 5 sets, most days.
- Seated or machine isometric knee extension holds if available, same duration.
- Straight leg raises and glute bridges to keep the hip working.
- Gentle calf raises, both legs, controlled tempo.
- Calf and quadriceps stretching, short holds, daily.
Phase 2: build strength through range
Three to six weeks is typical. Load should feel genuinely hard by the last couple of reps. If the knee is sore the next morning, keep the same weights for another week rather than dropping the exercise.
| Exercise | Sets and reps | Notes |
|---|---|---|
| Split squat | 3 x 8 each leg | Slow down, pause, controlled up |
| Step-down from a low box | 3 x 8 each leg | Height increases only when control is clean |
| Leg press or goblet squat | 3 x 10 | Add small weight increases weekly |
| Single-leg calf raise | 3 x 12 | Full range, pause at the top |
| Hamstring bridge or Nordic progression | 3 x 6 to 8 | Protects the whole leg, not just the knee |
Typical phase 2 week, two to three sessions.
Phase 3: put the impact back
Step 1
Land
Drop to land from a low box, absorbing softly, both legs then one leg.
Step 2
Hop
Small pogo hops and hop-and-stick, low volume, quality over quantity.
Step 3
Run
Straight-line running, building distance first, then speed.
Step 4
Change direction
Cutting, decelerating and turning, at drill pace before match pace.
Step 5
Play
Part training, then full training, then match minutes, built up over two to three weeks.
Order of reintroduction. Each step is only added when the previous one is comfortable.
The rules that keep it on track
If pain is not improving over six to eight weeks of consistent work, or the picture does not match a typical apophysitis, get an assessment rather than pushing harder.
- Judge every change by the next morning. No worse means the dose was right.
- Change one thing at a time: either add load or add impact, not both in the same week.
- Keep sport in wherever possible. Modified participation beats a month on the sidelines.
- Count the whole week, school PE, club training and matches all land on the same knee.
- Expect grumbles. This is not a straight line, and a sore week is not a failure.
Where our template programme fits
Our 6-week template strength and conditioning programme for Osgood-Schlatter follows exactly this structure, with the sets, reps and weekly progressions written out and video demonstrations for each exercise. It is designed for young athletes who have already been assessed by a qualified healthcare professional and given a diagnosis, to complement their rehabilitation rather than replace it.