Sun dives into detail in search of dominance

With the global swimming spotlight focused on the July 14-30 FINA World Championships in Budapest, Hungary, China's Sun Yang is concentrating on a more minute goal.

The 25-year-old, who has won Olympic gold medals in the 200-, 400- and 1,500m freestyle, is tweaking his start technique to gain a tiny but critical edge in speed.

Nearly a perfect swimmer in terms of stroke efficiency and distance endurance, Sun realized his relatively slow starting procedure - off the block to first stroke - could be fine-tuned for greater performance.