(LEAD) (Olympics) Swimmer Park Tae-hwan gets in 1st practice in Rio

(ATTN: ADDS photo, details)

By Yoo Jee-ho

RIO DE JANEIRO, Aug. 1 (Yonhap) -- South Korean swimmer Park Tae-hwan on Monday got in his first pre-Olympic training in Rio de Janeiro, where he'll attempt to win a medal in his third straight Summer Games.