Dunno exactly…but, I’ve done a few tethered swims in my backyard pool with an elastic tether. At one point I got curious how much pull I was putting on the tether. So, I swam at different “paces” and marked how far I stretched the tether and measured that force.
At my 50y repeat pace (1:25 / 100y), I was pulling at 35-40 lbs.
At my 100y repeat pace (1:35 / 100y), I was pulling at 25-30 lbs.
I wouldn’t go so far as to say that’s exactly the same as it would be swimming free, but that’s the order of magnitude anyway.
So, if I were going to put that into sets/reps/weight terms I would say something like:
20 sets, 22 reps per arm, 40 lbs. (20s rest) = 20x50y repeats @ 42s
20 sets, 44 reps per arm, 30 lbs. (20s rest) = 20x100y repeats @ 1:35
As noted above this should be a very swim specific motion. Lean over, point your head at the cable pully, stretch your arms out over your head: catch-pull-underarm-recover, repeat. Its almost exactly what I do with my stretch chords on days I can’t get to the pool.
ETA: Swim specific means, same joint motions, same range of motion, same speed of pull, same frequency of pull. if somone looked at you sideways, you should look exactly like you are swimming. And your pull speed/frequency should look the same. My stroke rate is 57 spm at 100y pace, and is 61 spm at 50y pace, and is 65 spm at 25y pace. I use a metronome to set the pace I’m trying to emulate.
I also simulate 25y sprints with 50 lbs. 20x11(per arm) @ 50 lbs, 15s rest.
Thank you Tom. I do try replicate a swim specific motion on the pull including some body roll by standing with or leaning over so that the catch position would feel like a free style catch. I don’t do a weighted overhead recovery though (maybe similar to a Vasa, I just let the weight return and then pull again).
What I miss with a stretch cord is the “anchor” feeling that a cable weight provides immediately at the point of “catch”.
So you are basically pulling at least 2X the weight for longer periods and faster compared to what I can safely manage for only 3X5 reps. And this is one of those things where I don’t think I could even pull 30lbs with a swim like motion even once with my good hand/arm.
Thank you for data that’s relevant to where I am at in comparison to much better swimmers.