<p>Tom:</p>
<p>The version with the leg sticking out to the front is called a pistol squat. The problem with this version is that forces the lower back to round. By standing on something, and giving the leg room to hang down, you take the lower back out of it.</p>
<p>There are two ways to progress the exercise. The way Mike Boyle teaches it is to squat down to the butt touches a box. </p>
<p>[Baby</a> Boomer 1 Leg Squats - YouTube](<a href=“Baby Boomer 1 Leg Squats - YouTube”>Baby Boomer 1 Leg Squats - YouTube)</p>
<p>Then move to a squat without the box:</p>
<p>[1</a> Leg Squat- Static/ Unsupported - YouTube](<a href=“1 Leg Squat- Static/ Unsupported - YouTube”>1 Leg Squat- Static/ Unsupported - YouTube)</p>
<p>Here’s an excellent video from Coach dos Remedios, college strength coach and buddy of Alwyn Cosgrove in California, in the video takes it even further and has you start from a sitting position.</p>
<p>[BID</a> VID - Single leg Squat Progressions - YouTube](<a href=“BID VID - Single leg Squat Progressions - YouTube”>BID VID - Single leg Squat Progressions - YouTube)</p>
<p>If you have the right combination of boxes, you can do this elevated by standing on a low box and sitting to a higher box or chair.</p>
<p>I’ve now gotten rid of the box and and I’m doing the squats standing on a 16 inch weight bench with my leg hanging off to the side. I just barely touch my foot down at the bottom, but try not to put any weight on it. The balance issue is compounded by the padding on top of the bench, though. I’m doing it on a slightly “unstable” surface from a balance standpoint. But, “balance” is really another word for hip stability…</p>
<p>I believe that an even better way to start the exercise would be to stand on a box and hang on to a TRX to “de-load” it.</p>
<p>Here’s another series of videos, showing a progression from easy to hard by Kevin Carr, one of the trainers at Mike Boyles:</p>
<p>[#1:</a> TRX-supported](<a href=“Single Leg Progression #1: TRX Supported Single Leg Squat - YouTube”>Single Leg Progression #1: TRX Supported Single Leg Squat - YouTube)
[#2:</a> Squat to bench](<a href=“Single Leg Progression #2: SIngle Leg Squat To Bench - YouTube”>Single Leg Progression #2: SIngle Leg Squat To Bench - YouTube)
[#3:</a> To bench from box](<a href=“Single Leg Progression #3: Single Leg Squat From Box - YouTube”>Single Leg Progression #3: Single Leg Squat From Box - YouTube)
[#4:</a> With load](<a href=“Single Leg Progression #4: Single Leg Squat with Kettlebell Load - YouTube”>Single Leg Progression #4: Single Leg Squat with Kettlebell Load - YouTube)</p>
<p>I don’t think I’ll be doing this version any time soon. </p>
<p>[With</a> a 160 lb weight vest](<a href=“1 Leg Squats- Double Bodyweight - YouTube”>1 Leg Squats- Double Bodyweight - YouTube)</p>
<hr>
<p>BC:</p>
<p>I think the main value of the single leg squat is to reduce the stress on the knee by strengthening the hip and the ability to stabilize the leg with the hip. Boyle uses it as a key exercise for athletes coming back from ACL surgery. If I recall, he doesn’t consider an athlete ready to play again after ACL surgery until they can do single leg squats. Of course, that’s could be little different for someone who has messed up cartilage and bone on bone knee pain.</p>