David KarasekA competitive teenage swimmer needs 8 to 10 hours a night, and the research on what extra sleep does to race times is staggering. Here's the data.
David KarasekIf your swimmer's 100 free has stalled, test their kick before you test anything else. Here's the exact test, and why a tapered PB should be their new normal.
David KarasekPraise feels supportive, but it's the weakest tool for building a swimmer's confidence. Here are the 3 secrets that actually work, for free.
David KarasekA change of coach can transform a swimmer without them doing anything differently. Most swim parents focus only on mindset. Here is the bigger lever.