After 15 years of practice and coaching, I think strength through flexibility is one of the best investments you can make for a resilient body, and in this thread I’ll do my best to show you how to start and then progress…
2/7. Full Side Split Squat Intro
This exercise is usually called a “Cossack Squat” after an Eastern European group called the Cossacks, who used a similar position in their traditional dance.
3/7. Full Front Split Squat Intro
This exercise didn’t get a name.
It was first taught by legendary strength coach Charles Poliquin, who used it to help make many Olympic gold medals.
He inspired me and my gym called “ATG” (ass to grass), so we often say “ATG split squat.”
4/7. How to Start
For both exercises, elevating and assisting can help you get in position and start grooving into your mobility!
5/7. How to Progress
As you’re pain-free and feeling good, you can work lower and to less assistance.
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For young athletes I’m obsessed with the slant squat because of how simply it allows you to build extra leg and knee ability to help handle the demand of sports.
I’ll now show you progressions, context, and how to build back if you’ve lost it…
I first like you to master 20 reps PAIN-FREE.
Single-leg is then a legit progression without weight.
But two to one leg is a big leap:
Use two hands to assist
Then one
Then unassisted!
10 per side PAIN-FREE is excellent!
Loading is another legit progression!
Progression is by load AND DISTANCE from body (closer and heavier = harder)
Kettlebell is a good way for young athletes to get used to this, but any form of loading applies, for example you could reach out a plate, then DB, then barbell.
My PE class format is: 1. PLAY, rotating through a wide variety of sports and games. 2. Learn just ONE exercise per day. Set the example, and kids will want to learn!
Here’s my system…
1/10. Slant squat = simple to build knee/quads foundation!
2/10. Kids love rings!
And by using the legs up, with some tension down, you can smoothly progress to pull-ups.
3 and 4/10. Sometime between childhood and leaving school, it’s easier to get and keep full front and side split squats!
Full demo below, showing how elevating the front foot scales difficulty.
I have no secrets and in this thread I will show you the progressions I used to now go 10+ years of no knee problems despite the following 10 conditions prior:
This is the first exercise I feel was really crucial for me.
Less angle, smaller step, and assistance make it easier, just as going downhill with less slope, smaller steps, and a walking stick, would make it easier.
Progression demo: (You can even add load for extreme goals.)
I don’t think backward walking was critical for me BUT it helped me warm up for the backward step ups I just showed you.
Progression is from smaller to bigger steps, and dragging load.
There’s a specific Big 3 for mobility relating to lower back pain and injury, and you can test and observe them for yourself.
In this thread, I’ll show you these 3 mobilities and the progression I use for each one…
The first mobility in the knee over ankle.
Notice how that allows me to sink down with less stress on my lower back.
None of these 3 are my opinions. They just are.
You can test and observe each for yourself.
My favorite progression for knee over ankle mobility is a full split squat, going from higher to lower front foot, and from assisted to unassisted (to, optionally: loaded, depending on the forces you want to handle in life).
🧵 2025 Knees Over Toes Update: 4 Main Progressions
I’ve been working on this subject for 15 years.
Despite a gnarly list beforehand, I’ve now been well over 10 years without a knee problem, while helping 1000s to their own wins.
The good news? These 4 are simpler than ever!…
Think of this thread as natural knee abilities in reverse, starting from:
In youth we can deep squat pain-free.
The more we lose that, the more benefits I’ve seen from counterbalance and heel elevation, progressing at your pain-free level from:
Bodyweight
to plate, full reach
to plate, reach only in front of knees
to dumbbell, above knees
to optional barbell loading.
The more wrecked the deep squat mobility, the more benefits I’ve seen from the deep split squat.
One of my knees has partially artificial kneecap, reattached quad tendon, and meniscus transplant.
The other then had diagnosed tears I didn’t operate on.
Progression from higher to lower front foot, and from assistance to bodyweight to weight, is perhaps the single greatest long-term investment I’ve made in my body.
10+ years of this has transformed my mobility and helped deep squats feel good!
Bonus: I think the increased hip flexor length is a major component of how I also ended my lower back problems - no problems there in 10+ years either!