Okay. I've heard about the 25lb tread in prep, how long do you have to do it for? Two minutes? And as for IWPs, how can I get to that level? I know doing a ton of flutter kicks with rocket fins helps, and doing different treads like hands out with head above the water for ten minutes with fins, and different stuff with weight. I can do a tread for five minutes with a ten pound diving block over my head, though my head is leaned back in the water.
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