====== What Does 30X0 Mean? ======
Tempo prescriptions come in a series of four numbers representing the times in which it should take to complete four stages of the lift.  In a workout, the tempo prescription will follow the assigned number of reps, such as:
Front Squat x 2-3 reps @ 30X0

===== The First Number =====
The first number refers to the lowering (eccentric) phase of the lift.  Using our front squat example, the 3 will represent the amount of time (in seconds) that it should take you to descend to the bottom of the squat.  (The first number always refers to the lowering/eccentric phase, even if the movement begins with the ascending/concentric phase, such as in a pull-up.)

===== The Second Number =====
The second number refers to the amount of time spent in the bottom position of the lift – the point in which the lift transitions from lowering to ascending.  In our front squat example, the prescribed 0 means that the athlete should reach the bottom position and immediately begin their ascent.  If, however, the prescription was 32X0, the athlete would be expected to pause for 2 seconds at the bottom position.

===== The Third Number =====
The third number refers to ascending (concentric) phase of the lift – the amount of time it takes you to get to the top of the lift.  Yes, I am aware that X is not a number.  The X signifies that the athlete should EXPLODE the weight up as quickly as possible.  In many cases, this will not be very fast, but it is the intent that counts – try to accelerate the weight as fast as you can.  If the third number is a 2, it should take the athlete 2 seconds to get the lift to the top regardless of whether they are capable of moving it faster.

===== The Fourth Number =====
The fourth number refers to how long you should pause at the top of the lift.  Take, for example, a weighted pull-up prescription of 20X2, the athlete would be expected to hold his or her chin over the bar for two seconds before beginning to come down.