Exercise 1 Box Squat Equipment: Barbells View Details TRI-SET A: 3 Sets 5 Reps 60"-90" Rest 1. Box Squat 2. Barbell Step Ups 3. Dumbbell Seated Box Jump A Tri-Set requires you to perform three different exercises with minimal rest in between. Depending on the workout, you will usually rest between 60-90 seconds after you complete the third exercise.