target heart rate

例句：

1. 1.To achieve optimal performance, it's important to maintain a target heart rate during exercise.
   为了获得最佳表现，在锻炼期间保持一个目标心率很重要。
2. 2.The coach set a target heart rate for the athletes to reach during the race.
   教练为运动员设定了一个在比赛中达到的目标心率。
3. 3.During intense workouts, it's common to see athletes push their target heart rates to improve their endurance.
   在高强度训练中，看到运动员将目标心率推至极限以提升耐力是很常见的。