I’ve come to think that the catch-up drill is the one most AOS swimmers really need.
It gets a bad rap because if overdone it slows and disrupts your natural stroke rhythm, and to swim faster you need more turnover generally, but for AOS swimmers who aren’t that great, this is the drill most of them really need.
It’s like a hallmark of AOS that their lead arm drops prematurely once they take a breath. If they had great competitive swimmer body control this wouldn’t be a big problem, but of course they (me included) don’t so you get all sorts of over-rotation, twisting, bending as a result. Virtually every single adult swimmer in the pool I train in drops the lead arm early, leading to all sorts of stroke chaos, and really should be doing this drill a LOT.
I had to really exaggerate it myself to get it - I thought I was doing a great job holding that arm out front as long as possible, but then on my early self videos, it actually looked pretty bad with no arm in front for a good gap in the stroke. I now practice it mindfully, really holding it out there and streamlining, and it was the key technique improvement that made my self-video form look from ‘kinda terrible’ to ‘kinda good.’
I def feel that it also fixes a lot of hard-to-explain common swim errors: over-rotation (you can’t over-rotate much with that arm out in front), corrects a lot of body position errors while stroking, and keeps you more streamlined and compact. But it’s definitely not a natural movement for most and has to be practiced.
If you’ve never self-video’d yourself, and you’re not a fast swimmer, I’ll bet you’d be horrified with how early your lead arm drops while swimming.
For those that are spinning out of control and have no patience, catch-up can be a good place to start. The rhythm issues are the ones that concern. Unfortunately, some people end up getting stuck in catch-up. If they don’t, then it can be very helpful for the reasons you mentioned.
I definitely agree that dropping the lead arm is a major issue. As you mentioned, I’ve found that it’s often a lack of stability that causes this to happen. Working on improving that skill tends to naturally improve the arm action.
As you also mention, when done well, it can fix a lot of problems in one shot, which is exactly the type of exercise to use.
Andrew