Why Do My Knees Hurt During Lunges?
- Sheela Cheong
- 1 day ago
- 6 min read
Lunges are one of the most common exercises used in Pilates, yoga, strength training, and rehabilitation.
They appear simple: step forward, lower your body, and return to standing.
Yet many people experience knee discomfort during this movement.
You may feel:
pressure at the front of the knee
discomfort when stepping forward
a feeling that your knee is unstable or unsupported
pain when lowering down or pushing back up
This can be frustrating because lunges are usually prescribed to build strength.
You may be trying to improve your fitness, return after an injury, or become stronger — but instead, your knees feel worse.
The important thing to understand is that knee discomfort during a lunge is not always a problem with the knee itself.
A lunge is a whole-body movement.
Your foot, ankle, hip, trunk, and nervous system all have to work together to control the transfer of your body weight.
Often, the problem begins before the knee even bends.
Mistake 1: Treating a lunge as a step forward instead of a controlled weight transfer
Many people think the difficult part of a lunge is lowering down.
Actually, the most challenging part happens earlier.
A lunge requires you to move from standing on two feet into a position where one leg has to accept and control your body weight.
This is not simply stepping forward - it is a weight transfer.
Your body has to execute a controlled transfer of your centre of gravity onto a new base of support.
If this weight transfer happens too quickly or without control, the front leg suddenly has to absorb the force of your body weight.
You may notice:
your front foot lands heavily
your knee feels like it takes the impact
your balance feels unstable
you have to "catch yourself" before lowering down
The issue is not necessarily that your knee is weak.
The issue may be that your body did not prepare the foot, hip, and leg to receive the load.
Mistake 2: Landing the foot without controlling how your weight lands
The foot is the first part of the body that receives your weight during a forward lunge.
Yet many people do not think about what happens when their foot lands.
They simply throw the leg forward and allow the foot to hit the floor.
A controlled lunge requires awareness of how the foot contacts the ground.
The foot should not slam down as one rigid block.
The muscles of the foot and ankle need to respond as your weight transfers forward.
The goal is not to avoid the heel or force yourself onto the toes.
The goal is to allow the entire foot to support you and gradually accept load.
When this is missing, the knee may become the place where you feel the impact because it is receiving force without enough support from the rest of the movement system.
This is why simply being told to "keep your knees aligned" does not always solve the problem.
The knee is affected by what happens before and below it.
Mistake 3: Dropping down instead of lowering with control
Once your foot has landed, the next challenge is controlling the lowering phase.
Many people think of a lunge as dropping the body towards the floor.
But your body should not simply fall down with gravity.
A strong lunge involves your muscles continuing to support you as you lower.
Think about the difference between dropping and releasing.
Dropping means gravity takes over and your joints absorb the movement.
Releasing means you allow your body to move downward while maintaining control and support.
The lowering phase should feel deliberate.
Your front leg bends because your muscles are controlling the movement, not because your body is collapsing into the position.
This applies whether you are doing:
a yoga lunge or Warrior variation
a Pilates standing sequence
a gym split squat or walking lunge
The exercise may look the same, but the quality of control determines what your joints experience.
Mistake 4: Your hip is not helping control the movement
The knee does not work independently.
During a lunge, the hip muscles help control the position of your thigh bone and pelvis.
If the hip is not contributing effectively, the knee may have to manage more of the movement.
You may notice this as:
the knee drifting inward
difficulty balancing on one leg
your pelvis shifting or rotating
your front thigh working much harder than expected
This does not mean everyone needs to force their knee outward.
Good alignment is not about creating a perfect shape.
It is about having enough strength and coordination to control the position of your body as you move.
Mistake 5: Going deeper before your body can control the movement
A deeper lunge is not automatically a better lunge.
Depth requires strength, mobility, and control.
If lowering deeper causes you to:
lose balance
shift your weight excessively
lose control of your knee position
compensate through your lower back or hips
then your body may not yet have the capacity for that range.
This is common in many forms of exercise.
Someone practising yoga may push deeper into lunges because flexibility is valued.
Someone doing Pilates may try to match the range demonstrated in class.
Someone training in the gym may increase weights or repetitions.
But more range or more load is only useful when your body can manage it.
What should a well-controlled lunge feel like?
A good lunge should feel like your whole body is contributing.
You should generally feel:
your foot supporting your weight
your thigh muscles working
your glutes contributing as you push back up
your body remaining stable as you move
You should not feel:
your knee absorbing all the effort
sudden pressure at the front of the knee
a feeling that your knee cannot support you
the need to avoid movement because you do not trust your body
The sensation will vary depending on your history.
A beginner learning movement for the first time, someone returning after surgery, an older adult rebuilding strength, and an athlete training for performance will all have different starting points.
The goal is not to force everyone into the same movement pattern.
The goal is to find the version of the movement that allows your body to build strength safely.
If lunges hurt your knees, the answer may not be to stop exercising
Many people respond to knee discomfort by avoiding movement completely.
Others try to push through and hope the problem disappears.
Neither approach addresses why the movement feels difficult.
The first step is understanding what your body is doing during the exercise.
Is the foot accepting the load?
Is the hip helping?
Are the muscles sharing the work?
Is the movement controlled, or are you relying on momentum?
Do This Instead
If lunges continue to feel uncomfortable, the answer may not be to stop strengthening your legs.
Sometimes the better approach is to return to a simpler version of the movement and rebuild control first.
One option I often use is the split squat.
Unlike a lunge, where you have to coordinate a step forward and a weight transfer onto one leg, a split squat starts with your feet already in position — one foot forward and one foot back.
This gives you more time to focus on balance, lower body control, and how your muscles are working.
From here, you can learn the difference between lowering with control and simply dropping down with gravity.
The goal is to understand how your legs, hips, and core work together to support the movement.
Once you can recognise that feeling of control and muscle activation, returning to a lunge becomes much easier because you already understand what your body should be doing during the lowering phase.
With the right adjustments, many people can continue strengthening their bodies without repeatedly aggravating the same areas.
Exercise should help you build confidence in your body — not make you afraid to move.
If you are unsure whether your experience comes from foot placement, weight transfer, muscle activation, or movement control, individual observation can help reveal what is happening in your body.
Private Pilates and movement sessions focus on understanding your unique movement patterns and adapting exercises to help you build strength with better control and confidence.
Learn more about Pain & Recovery → here.
Videos from @jacksantorafitness and @dr.meganmarie.pt
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