Michael Andrew is only 19, but he has been an outlier for years. In 2013, after breaking more than 30 U.S. age-group records, he turned professional at age 14. No American swimmer had ever turned pro that young. And by doing so, he forfeited a chance to compete for an American university. Instead, Andrew continued to train at home in Kansas, in a two-lane pool, coached full-time by his father, Peter, using a highly-unconventional training method.
It's called Ultra-Short Race-Pace Training (or USRPT), which involves very low volume, all at race pace.
Link12Nov2018