lap 1: 500m @ 10:40.2 lap 2: 500m @ 10:55.5 lap 3: 500m @ 11:12.6 lap 4: 500m @ 11:09.9 基本仰泳 50m 蝶式 25m 仰式 25m 一開始游肩膀有點緊, 游了十幾分鐘才慢慢舒緩。