How to Log Tempo Training: Track Eccentric Speed and Isometric Holds

September 24, 2026

The rule: log the rep you actually performed

Tempo training means deliberately controlling how long each part of a rep takes. Isometric holds are positions where you create tension without moving a joint, such as pausing at the bottom of a squat or squeezing a cable row at the finish.

Both can make a set much harder without changing the weight or rep count. A set of 80 kg for 6 bench press reps with a three-second lowering phase and a one-second pause is not the same training stimulus as 80 kg for 6 normal-speed reps. If your app stores only load and reps, the harder set can look like stalled strength.

Your log needs to preserve four things: the load, the reps, the timing, and where the hold happened. That gives you a fair comparison the next time you repeat the exercise.

Use four-part tempo notation

A common tempo format lists four numbers in this order:

The lowering phase, called the eccentric phase, when the muscle lengthens under tension.
The pause after lowering.
The lifting phase, called the concentric phase, when the muscle shortens to move the weight.
The pause at the top.

For example, 3-1-1-0 means three seconds down, one second paused at the bottom, one second up, and no pause at the top. 2-0-1-2 means two seconds down, no bottom pause, one second up, and a two-second hold at lockout.

The format is useful, but it is not universal. Some programs write the concentric phase as X for moving up as fast as possible, even though the weight may still move slowly. Others list only three numbers. Write the prescription in plain language if there is any doubt: three seconds down, one second at the bottom, controlled up is better than a mysterious string of numbers.

A pause is different from simply changing direction slowly. A paused squat should come to a clear stop. A slow squat can keep moving through the bottom while you maintain control. Log those as different prescriptions.

Record the minimum useful fields

For every tempo or hold set, capture these fields:

Exercise and variation: A high-bar squat, low-bar squat, and front squat should not share a vague squat label.
Load: Include the total bar weight or the dumbbell weight used on each hand.
Reps: Count completed reps, not the seconds spent holding a position.
Tempo target: Record the intended sequence, such as 3-1-1-0.
Actual tempo: Note meaningful changes, such as 3-2-1-0 when the pause ran longer than planned.
Hold location and duration: Say two-second pause at the bottom or five-second hold at lockout.
RIR: RIR means reps in reserve, or how many clean reps you could have completed before stopping.

You do not need laboratory-level timing. If the program calls for a two-second eccentric and you consistently count one-one-thousand, two-one-thousand, that is enough to make your sets more comparable. The important part is using the same counting method from week to week.

If you do not know the actual tempo, do not invent precision. Log the target and add a note such as slowed near failure or pause shortened on final rep. Honest notes are more useful than a perfectly formatted number that did not happen.

Log repeated holds differently from one-off holds

A hold that happens on every rep belongs in the tempo prescription. For example, a cable row performed for 10 reps with a two-second squeeze at the finish can be logged as 10 reps, 2-second peak contraction.

A hold performed only after the final rep should be recorded separately. A set of 8 leg extensions followed by a 15-second top-position hold is not the same as 8 reps with a 15-second hold on every rep. Log it as 8 reps + 15-second final hold so the next session does not accidentally treat it as a normal 8-rep set.

The same rule applies to pauses between reps. A paused bench press with a one-second stop on every repetition is one tempo prescription. A final-rep lockout hold is an added event after the set. Separating those details keeps your rep count and difficulty history clean.

For holds without reps, use seconds as the primary result. A wall sit might be bodyweight, 45 seconds. A mid-range cable fly hold might be 20 kg, 20 seconds. Do not convert either into an invented rep count.

Use a voice-friendly logging script

The fastest log is the one you can enter before the details disappear. Use the same order every time:

Exercise, load, reps or seconds, tempo, hold location, RIR.

A complete example sounds like this:

Bench press, 80 kilos, 6 reps, three seconds down, one-second pause on the chest, controlled up, two RIR.

For a final hold, say:

Leg extension, 45 kilos, 10 reps, normal tempo, then a 15-second hold at the top, one RIR.

With GymLog, you can speak the basic set immediately after racking the weight, then keep the tempo and hold details in the set note. If you are using another strength app, the same structure works in a typed note. Consistent wording matters more than the brand of app.

When the tempo changes during a set, record the change instead of hiding it. Six reps, target 3-1-1-0, final two reps closer to 2-0-1-0 tells you that fatigue affected the execution. That is useful training information, not a failed log.

Compare like with like

The main benefit of logging tempo is better interpretation. Compare sets only when the exercise, range of motion, load, reps, and tempo are reasonably similar.

If you do 80 kg for 6 reps at 3-1-1-0 this week and 80 kg for 6 reps at 2-0-1-0 next week, the second set may be easier even though the numbers match. If you do 80 kg for 6 reps at 3-1-1-0 and later complete 80 kg for 7 reps at the same tempo, that is a clearer improvement.

The reverse is also true. If your reps stay at 6 but the pause increases from one second to three seconds, the set became more demanding. Do not label that a strength plateau. You changed the task.

Watch for unplanned tempo drift too. A fast descent, bounced reversal, or shortened pause can make a set look stronger than it really was. Mark the actual execution in your note and avoid comparing it with clean, controlled sets.

A simple logging checklist

Before the set, choose one tempo and one hold location. During the set, count with the same rhythm and stop the hold when the position or technique breaks. After the set, log the result before starting the next one.

Use this compact format:

For example:

Paused squat | 100 kg | 5 reps | 3-2-1-0 | held target | two seconds at bottom | 2 RIR

That single line tells you far more than 100 kg x 5. It preserves the technical difficulty of the work, so your future comparisons reflect what your muscles actually had to do.