I’ve never measured micro‑currents in a pool, but the idea makes sense. If the Gulf Stream’s night surge adds even a few centimeters per second to a swimmer, you could offset that by adjusting your stroke timing or drafting off the wall. In practice I’d drop a small sensor into a lane, log data while I do sets, then compare my split times to the current profile. It’s just another variable to shave off—like adjusting foot‑strike timing for a millisecond advantage. If you can turn that data into a routine tweak, you’ll see the clock move. Just remember, consistency beats curiosity alone.