My coach had us do this drill using a paddle on your weak side (right handed => left hand paddle) and fin on the opposite foot for counter balance.
The idea was 90% of people out there are stronger with their dominant arm, and don’t get as much out of their weak arm, this was a way to get extra work on the sissy arm.
The team produced a number of US National Team members, so I would say, it’s not just mumbo-jumbo.
Drills aren’t meant to be done at race pace for the most part, so I wouldn’t say going slow in workout makes him not expert-level.
There are some sub-20 sprinters who look like Learn-To-Swim in practice.
We do this drill with our masters team. It works pretty well for swimmers who have strong side/weak side discrepancy.
Mark
If this is the goal, how do you measure improvement or success?
Like the poster above, I thought it was all about kick timing.
Success was measured when you took the equipment off, and could feel and the coaches could see a more balanced stroke.
I agree, the drill can be used with the paddle on either arm to get the feeling of timing your kick to finish of the pull, but many drills can be done for more than one reason.
In my experience, we primarily kept the paddle on the weak arm to work on balancing the stroke.
I remember doing drill in sets of 3x300 trying to keep them under 3 minutes, you really didn’t have any choice push hard with the weak arm.
We weren’t so much using it to correct technique, as much as to strengthen the weaker arm so that the imbalance corrected itself.