Leg Extensions Are SAFE For Your Knees

Learn why leg extensions are safe for your knees!

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Are Leg Extensions Safe After ACL Reconstruction?

Are Leg Extensions Functional?

Programming Leg Extensions After ACL Reconstruction (3 Phases)

Intro (0:00)
Anatomy (0:12)
Too Much Stress On Your Knees? (0:42)
Is Stress Bad? (2:33)
What If You Have Pain? (4:10)
Summary (4:39)

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Disclaimer: The information presented is not intended as medical advice or to be a substitute for medical counseling but intended for entertainment purposes only. If you are experiencing pain, please seek the appropriate healthcare professional.

[wholarrryo]

usually skipped legs lol but now that I'm grinding deadlifts and squats i have knee pain this video makes so much sense thank you.

[PartialOpinions]

I am 3 years post ACL reconstruction and all I can say is that the leg extension machine kills my knee, and it's the only machine that does that. Contrary to the two papers presented, I would argue that knee compression is not the issue; the issue is that the motion disturbs knee cap tracking -- at least for me. Writing this message to hopefully reach people before they learn what I did, the hard way.

[gnolaum]

The best explanation and advice I found on the web for leg extensions! Thank you very much!

[fernworm]

Tore my patellar tendon last March, been banging out leg extensions. Long road but getting results!

[RXP]

So when I got into lifting - I religously avoided Leg Extensions due to what I thought were well referenced articles (like Eric Cressey's tnation article on it). I ended up getting quad tendonitis recently and to my surprise leg extensions were the cure! I can't do them at home but do the Spanish Squats and the whole thing about adapation makes sense to me now. Your videos are fantastic - keep doing what you're doing please!

[ParvParashar]

Great video! Leg extensions and upright rows were the two exercises that I wanted to do for a long time but avoided due to unreasonable thinking and irrational fear. You guys are doing incredible work sharing all the phenomenal information with us and providing the evidence for it. I can’t thank you enough for all the amazing stuff you do. I’m not afraid of any movement anymore. It’s just about taking proper and reasonable safety measures and seeing how the movement feels for you as an individual and observing the feedback your body gives you. My knees and shoulders love and are happy with leg extensions and upright rows respectively. 💪👍🙏

[cesarnoyoutube]

Awesome content and clearly evidence-based research delivered... thank you so much for your work! Keep going...

[ftello]

Go tell Jeff Cavalier that leg extensions are safe for your knees lol..

[debsagan]

Had a DTKR 6 months ago. This is really important and your vidieo about isometric LE was great too! One on TKR recap would be helpful.

[Kmasse]

Broke my knee three times past 30 years in sports (skiing, judo, football) and just over a year ago it was operated again as I received a tackle while running at full speed. The surgeon that performed the operation is part of FC Barcelona so I trust him fully. He told me to avoid squatting beyond 90 decrees (all the way down). However, leg extensions and leg presses seem to be good for me (ACL and MCL injury, osteoarthritis).

[VpKing]

I couldn't train legs for 2 years because of an injury, surgery etc ! But im pretty sure leg extension and any other machines were created for muscle rehabilitation

[davidsanders.fineart]

The studies used ankle weights for LAQ. The issue is there is no resistance at the starting position for this (knee flexion start). This was made evident with the isometric resistance in the second study. It's the load of the knee joint that's the issue.
This video was enlightening, but it didn't really explain long term effects of degeneration at the payellofemoral joint, which id love to hear more about.

[sidneyball]

I know this is 2 years old. Having said that, thank you for providing sources. Youtube is inundated with "experts" lol these folks just expect you to take their word. You back it up. Thank you. Also, new Sub cus if your VMO isolation debunk video where you mentioned overall improved leg strength would be of greater benefit than attempted isolation of the vmo.
Anyway.. thanks mate!

[gokudbz]

Your videos really helps me keep going, thanks bro ❤️

[tinofradiante]

Thank you very very much Sir
Your content is absolutely incredible

[ozzy]

I get knee pain right under my knee cap when doing leg extensions - however it's only in my right knee.
For some reason I don't get any knee pain when squatting or doing leg presses (?).

[SKIAMIALMOG]

Dear Friend!
Thank you very much for all the great information which truly assist me after my second time ACL injury.
I am all for surgery but need two stage ACLR, from the first one that I had 19 years ago, done the hamstring graft with bioabsorbable screw, remain a cyst in the tibia tunnel, already done the first stage with lemaire procedure on the 11/07/2023, one thing the first injury taught me, is that strengthening knee muscle is the most important thing, using extensions machine which isolating the quadricep is a must in my belief! Since my second injury on the 22/03/2023 when I am using the extensions device and trying to load weight I feel the tibia buckling!!! and using the device only up certain angle doesn't stimulates the muscle enough for me.
Can you please give some insights?
Thanks
Ami ALMOG

[_clorp]

This helped me so much. I've been avoiding these due to knee problems, focusing mainly on squats, however it was only getting worse. The 90° is where I feel the most pain, so I think I've been over exerting on the squats. Would you agree?

[rajeshchatterjee]

Thank you so much for such an informative video.

[nicknelly]

Yes, they're safe. Keep doing them. You're welcome.