Mythbuster
Mythbuster: The knee must not be pushed past the toes during warm-up/training (lunges, l…
Summary
The rule "knee never past the toes" is a myth: a forced limitation of forward knee movement shifts the load onto the lumbar spine and hip instead of sparing the knee (Fry et al., 2003). With correct technique, forward knee movement is physiologically normal and important for quadriceps activation.
Mythbuster: The knee must not be pushed past the toes during warm-up/training (lunges, l…
The myth
The knee must not be pushed past the toes during warm-up/training (lunges, leg press).
What the evidence says
Limiting forward knee movement shifts the load extremely onto the lumbar spine and the hip, instead of significantly sparing the knee joint. With correct control, forward movement of the knee is physiologically normal and essential for full activation of the quadriceps.
Practice: Concrete implementation
In practice, the myth "knee never past the toes" often leads you to perform lunges, leg press, and squats with an artificially backward-shifted hip. This barely unloads the knee, but shifts the load onto the lumbar spine and hip (Fry et al., 2003). The following implementation shows how you can allow the natural forward knee movement in a controlled way without losing control.
Example A — Weekly plan (integrating forward knee movement)
| Day | Exercise | Focus | Sets × reps | Forward knee movement |
|---|---|---|---|---|
| Mon | Split squat (bodyweight) | Learning technique | 3 × 8 per side | Knee may go past the toes |
| Tue | Leg press | Controlled depth | 3 × 10 | Foot position so that the knee travels forward naturally |
| Thu | Lunges (walking) | Stability | 3 × 10 per side | Actively guide the front knee forward |
| Fri | Goblet squat | Depth + control | 3 × 8 | Knee follows the direction of the foot |
| Sat | Warm-up: squat without load | Movement preparation | 2 × 10 | Consciously push the knee past the toes |
Example B — Execution & coaching cues
- Cue 1 – "Knee follows the foot": Knee and toes point in the same direction, the knee may travel forward.
- Cue 2 – "Heel stays on the floor": The heel stays loaded while the knee comes forward.
- Cue 3 – "Don't artificially push the hip back": Avoid consciously pushing the glutes back, which shifts the load into the lower back.
- Cue 4 – "Control the tempo": Lower for 2 seconds, hold briefly, press up in a controlled manner.
- Common mistake: The knee is consciously forced behind the toes – this causes the upper body to tip forward and the lumbar spine takes over the work.
Example C — Microcycle (4 weeks)
| Week | Focus | Implementation |
|---|---|---|
| 1 | Movement pattern | Split squat and warm-up squat without load, knee consciously forward |
| 2 | Building load | Goblet squat and leg press with controlled forward knee movement |
| 3 | Intensity | Lunges with added weight, technique remains stable |
| 4 | Consolidation | All exercises with normal knee movement, focus on control |
Ideal: You let the knee travel forward naturally in every squat, lunge, and leg press variation, you control tempo and foot pressure, and you feel the load in the quadriceps instead of the lower back.
Good enough: You allow forward knee movement in at least one exercise per training session and make sure not to artificially push the hip back.
First step: In your next warm-up, perform 2 × 10 squats without load consciously with the knee past the toes and observe how the load feels compared to your previous execution.
Continue at the source
Read the original sourceFAQ
Is it really safe for the knee to go past the toes during a lunge?
Yes. With correct control and controlled execution, forward movement of the knee is physiologically normal. What matters is foot position, tempo, and control – not a rigid boundary at the toes.
Why is the rule "knee not past the toes" still so common?
It is a simplified rule of thumb intended to reduce knee load. However, the evidence shows that a forced limitation shifts the load onto the lumbar spine and hip, instead of significantly sparing the knee joint (Fry et al., 2003).
What should I pay attention to instead during training?
Make sure that the knee and toes point in the same direction, the heel stays loaded, and you control the tempo. Avoid artificially pushing the hip back so that the load does not shift into the lower back.