Is it bad to fully extend on leg press?

Author: Karelle DuBuque  |  Last update: Friday, June 27, 2025

Push the footplate using your feet until your legs are extended, but make sure that you don't extend your legs completely and lock your knees. That puts additional strain on your knees and could lead to injuries in the long run.

Should you fully extend legs on leg press?

When you're doing the leg press, stop just short of full knee extension when you push on the platform. When you return to the starting position, do not let your thigh drop below the level of 90 degrees at the knee. If you dip your thighs too low, you may hurt your knees.

Should you fully extend on leg extension?

Your legs should be fully extended, but remember not to lock your knees. Bend your legs at the knees to bring your heels toward your glutes. You want to get a full range of motion when you use this machine. Bend your knees as much as you can.

Should you fully lock out on leg press?

Locking your knees on a leg press machine is generally not recommended, as it can lead to joint strain and increase the risk of injury. When you lock your knees, you shift the load away from the muscles (like the quadriceps, hamstrings, and glutes) and onto the knee joints.

Should you go past 90 degrees on leg press?

Your legs should form an angle of about 90 degrees at the knees. If your feet are too high on the plate, it will stress your glutes; too low puts unnecessary pressure on your knees.

7 Leg Press Mistakes and How to Fix Them

Is it OK to go heavy on leg press?

Typically, the average weight a beginner should start with is 50-75% of their body weight, while an intermediate lifter can aim for their body weight or more. Advanced lifters, including those aiming to set leg press world records, may push over 500 pounds.

Should you lock legs on leg extension?

Controlled Weight: Avoid lifting weights beyond your fitness level. Gradually increase weight in alignment with strength progression. Avoid Locking Knees: Never lock knees at full extension, which may cause patellofemoral stress.

Are hack squats bad for the knees?

Hack squats are not bad for your knees, as long as you load and increase them sensibly. They can actually help you build stronger and healthier knees that can handle any challenge. Just always remember to listen to your body, adjust your training accordingly, and seek professional help if needed!

Should you fully extend when lifting?

Proper form and full extension prevent the risk of injury and are central to any lifting regimen, although a great many exercisers overlook this rule.

What are the mistakes in leg extension?

Anything less than 90 degrees will result in the knee being positioned over the toes, which will result in undesired stress at the knee joint. Furthermore, anything more than 90 will cause less effective contractions at the quads.

What happens if you straighten your legs on leg press?

Things to Avoid While Doing a Leg Press

Incorrect posture is one of the most common causes of injuries when using any gym equipment. Remember to stay in control of your movements at all times and prevent your knees from locking (i.e., straightening your legs completely) when you're pushing the footplate.

Do you fully extend on leg extension?

Squeeze your quad and straighten out your right leg until it is fully extended. Pause before slowly returning to the starting position. Repeat for the desired reps before switching legs.

What is considered a lot to leg press?

Beginner - 1 x bodyweight. Novice - 1.75 x bodyweight. Intermediate - 2.75 x bodyweight. Advanced - 4 x bodyweight.

Why am I so weak on leg press?

The culprit is typically weak hip abductors, including the gluteus medius, Nobbe says. The ideal position for your knee is tracking directly over your toes throughout the movement. Your knee is like a hinge, so it should only bend in one direction and not cave in or out as you perform the leg press.

What not to do on leg extension?

Now that the machine is set up right, it's time to do a proper leg extension: Slow and controlled. The big mistake people make with this exercise is bouncing/swinging the leg bar up, using momentum, and letting it drop back down.

Does leg extension build big quads?

Leg extensions are a key isolation exercise to build your quads and lower body strength. Strong leg muscles are important for daily movements and activities, such as standing and walking. The strength of your quads also affects your athletic performance and helps with running and jumping ability.

Is there a wrong way to do leg press?

Let's take a look at six common mistakes you can make on this solid leg movement.
  1. Lowering the Sled Too Far. ...
  2. Doing Only Shallow Reps. ...
  3. Not Having Your Heels on the Sled. ...
  4. Allowing Your Knees to Collapse Inward. ...
  5. Turning Your Feet Excessively Inward or Outward. ...
  6. Locking Out Your Knees.

Should I go past 90 degrees on leg press?

Your toes should point forward, and your seat should be adjusted along with the foot position in a way that bends the knees at about 90 degrees.

Is a 400 lb leg press good?

The average Horizontal Leg Press weight for a male lifter is 425 lb (1RM). This makes you Intermediate on Strength Level and is a very impressive lift. What is a good Horizontal Leg Press? Male beginners should aim to lift 156 lb (1RM) which is still impressive compared to the general population.

How much can a 12 year old lift?

Don't use heavy weights yet! Teens should start out with lighter weights, proper form, and more repetitions. A good rule of thumb is to start with a weight you can easily lift 10 times, with the last two repetitions being increasingly difficult. For some teens, this might be 1 pound to 2 pounds.

What is the world record for leg press?

William Cannon holds the current world record for the heaviest leg press. He managed to leg press 1,120 kg using both legs. Additionally, he has records for pressing 410 kg with his right leg and 400 kg with his left leg.

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