Tennis star Taylor Townsend used to always do the most. At 30, she's training less to extend her career.

Taylor Townsend is competing at the highest level of tennis while running a YouTube channel, Down The T, and a clothing line. Courtesy of Kensal Studios Tennis star Taylor Townsend has a new strategy for staying on top of her game. The 30-year-old has a collection of side hustles — a YouTube show, a clothing line — which give her energy. She also has a new favorite high-protein snack and a new approach to training. Taylor Townsend is all about catching a vibe right now. Off the court, the…