This refers to the tempo in with the lift is completed. The first number always refers to the speed (or count) in which the weight is lowered (even if it is a lift in which the weight is lifted first – Deadlift, pull up…). In both of the above tempos, the athlete would count to 3 as they lower the weight. The second number refers to how much pause there is at the bottom. The third number is the speed at which the weight is lifted. If an X appears as the third digit the athlete should attempt to explode up, or lift very quickly. The last number refers to the pause at the top (between reps).