How to Read Tempo Notation: Understanding the 4-Digit System

The Four Digits, Decoded

Every tempo prescription in strength training consists of four numbers separated by hyphens. Each number tells you how many seconds to spend in a specific phase of the rep. Here is what they mean, in order:

First Digit: Eccentric Phase

The eccentric phase is the portion of the lift where the target muscle lengthens under load. In a bench press, this is lowering the bar to your chest. In a squat, it is the descent. In a bicep curl, it is lowering the dumbbell back down.

This is always the first number because the eccentric phase is where the most muscle damage occurs and where tempo control has the greatest impact on training stimulus. A "3" here means you take 3 full seconds to complete the lowering portion.

Second Digit: Bottom Pause

The second number represents the pause at the transition point — typically the bottom of the movement. In a squat, this is the hole. In a bench press, this is the bar on your chest. In a curl, this is the arm fully extended.

A pause here eliminates the stretch reflex — the elastic energy stored in tendons and muscles at the bottom of a movement. When you bounce out of the bottom of a squat, you are using stored elastic energy rather than pure muscular force. A 1- or 2-second pause removes that advantage and forces the muscle to generate all the force for the concentric phase.

Third Digit: Concentric Phase

The concentric phase is where the muscle shortens to move the load. This is pressing the bar off your chest, standing up from a squat, or curling the dumbbell up. The third number tells you how many seconds this should take.

For hypertrophy work, a 2- or 3-second concentric is common. For strength and power work, you will often see an "X" here, meaning explode through the concentric as fast as possible.

Fourth Digit: Top Squeeze

The final number is the pause or squeeze at the top of the movement before beginning the next rep. For many compound lifts, this is zero — you transition immediately into the next eccentric. But for exercises where a peak contraction adds value (think lat pulldowns, leg curls, or lateral raises), a 1- or 2-second squeeze at the top can significantly increase the training effect.

Common Tempo Prescriptions

Here are some frequently used tempos and what they are best suited for:

Applying Tempo to Real Exercises

Bench Press at 3-1-2-0

Unrack the bar and begin. Lower the bar to your chest over 3 seconds, keeping tight throughout. Pause with the bar on your chest for 1 second — no bouncing. Press the bar back to lockout over 2 seconds with controlled effort. Immediately begin the next rep with no pause at the top.

Squat at 4-1-X-0

Descend into the squat over 4 full seconds, maintaining tension in your quads and glutes throughout. Pause in the hole for 1 second — no relaxing, no shifting. Explode out of the bottom as fast as possible (the "X"). Begin the next rep immediately with no pause at the top.

Bicep Curl at 3-0-2-1

Lower the dumbbell over 3 seconds, feeling the stretch in the bicep. No pause at the bottom — immediately begin curling up over 2 seconds. At the top, squeeze the bicep hard for 1 second before beginning the next rep.

Let the app count for you

Lifting Tempo guides every phase with audio ticks, voice countdowns, and haptic taps. Set your tempo and focus on the lift.

Top Start vs. Bottom Start Exercises

This is where most people get confused. The tempo notation always reads in the same order: eccentric, bottom pause, concentric, top squeeze. But different exercises begin in different positions.

Top Start Exercises

Squat, bench press, overhead press, leg curl, lat pulldown. These exercises begin at the top position, so the first thing you do is the eccentric (lowering). The tempo digits map directly to the movement order: you lower (digit 1), pause at the bottom (digit 2), lift (digit 3), and pause at the top (digit 4) before repeating.

Bottom Start Exercises

Deadlift, barbell row, pull-up, leg press (if starting from the bottom). These exercises begin at the bottom position, so the first thing you do is the concentric (lifting). On the very first rep, you start with digit 3 (concentric), then digit 4 (top pause), then digit 1 (eccentric), then digit 2 (bottom pause). From the second rep onward, the cycle continues: eccentric down, pause, concentric up, pause.

The key insight is that the notation describes the phases, not the movement order. The first number is always eccentric regardless of where the exercise starts. This consistency is what makes the system universal — once you understand the four digits, you can apply them to any exercise.

Common Confusions

"Do I really need to count?" — Counting in your head works in theory, but research shows people consistently undercount when under load. This is why a dedicated tempo timer like Lifting Tempo exists: it provides external cues so you can focus entirely on the lift rather than mental arithmetic.

"What if I can't maintain the tempo?" — If you cannot complete the prescribed tempo on the last few reps, the weight is too heavy. Reduce the load until you can hit every second of every rep cleanly. This is the point of tempo training: it forces honest load selection.

"Is 0 the same as no pause?" — Yes. A "0" means transition immediately to the next phase. There is still a brief moment of direction change, but you are not intentionally holding the position.