top of page

Clinch Lesson 1 - Single Under-hook & Knee Strike

Updated: Dec 12, 2023

This is the first lesson in our Clinch 101 series.

The under-hook is a great offensive technique that you can use when in the clinch. The single under-hook occurs when one of your arms goes under the assailant's arm/armpit, while in the clinch. You can control the assailant by pulling them down to meet your strikes. You can also use the under-hook to move them forwards, backwards, and to either side.

How to perform the single under-hook

Under-hook front view Under-hook back view

  1. Facing the assailant (your partner in practice), bring your left arm underneath their right arm (same side) until your bicep/shoulder is pinned into their arm pit.

  2. Clasp that hand with your other hand and pull him down to control him. Alternatively, you can grab your chest with your under-hook hand, leaving your other hand free to strike with.

  3. Do not lean back or reach up too high; doing so will put you off balance. If they are too tall, use a different clinch (you'll learn more clinches in the upcoming weeks).

The first strike from the single under-hook clinch is the knee to the groin:
  • From the single under-hook, pull the assailant down as you drive your knee straight up into the their groin. The rear knee strike will have more power than the lead knee strike, but use either if the other cannot reach their groin.

Below is a video showing how to strike the groin while using the single under-hook.

If you're interested in learning essential self-defense techniques and strategies for yourself and your children, check out my book, "The Short Fight," available on Amazon via this link:

As a bonus, you'll gain free lifetime access to my video library, containing over 100 self-defense and fitness videos, accessible at

Looking to get into the best shape of your life? Check out our fitness training programs here:

"Your support means the world to me, and I would be incredibly grateful if you could take a moment to leave a review of my book, "The Short Fight" on Amazon. Your feedback not only encourages me, but also enables me to keep offering free training for you.

Your review can make a real difference. Just click on this link: .

Thank you immensely for your time and support!"

Until next time, Stay Safe!

Lawrence Castanon

Author, The Short Fight


The single under-hook to knee strike the groin

117 views0 comments

Recent Posts

See All
bottom of page