How to Log Unilateral Exercises: A Simple Left and Right Template

To log unilateral exercises, use one numbered set for the pair of sides. Record the load used by one side and the reps that side completed. For a single-arm dumbbell row at 20 kg for 10 reps on each arm, write 20 kg × 10 for the left and 20 kg × 10 for the right. Do not double the load or write 20 reps just because you performed both sides.

Use this simple template:

EXERCISE: ____________________

Set 1  Left:  load ______  reps ______
       Right: load ______  reps ______

Set 2  Left:  load ______  reps ______
       Right: load ______  reps ______

Note only if setup or range changed: ____________________

That rule keeps the log readable on the next session. A unilateral movement is one limb at a time, but it is still one planned set when both sides are part of the same round. If the sides differ, write the difference instead of averaging it away.

What counts as a unilateral exercise in a workout log?

Unilateral exercises train one arm or leg at a time. Common examples include single-arm rows, single-arm cable presses, split squats, step-ups, and single-leg leg curls. The useful distinction for a log is not the exercise's name. It is whether you complete a left and right effort as one round.

Research comparing unilateral and bilateral resistance training does not make one universally better. Strength changes tend to be specific to the way the movement is trained, which is a good reason to keep your records specific too. This systematic review and meta-analysis is useful background, but it is not a reason to change your programme from a single log entry.

For most gym logs, use these definitions:

The point is consistency. Pick a rule that describes the work you did, then use the same rule every time you compare that exercise.

Should you double the dumbbell weight or the reps?

Usually, no. Log the weight that one working side held or moved, and the reps that side completed. If you use one 20 kg dumbbell for 10 controlled reps per arm, 20 kg × 10 describes the loading decision you need to remember next time. 40 kg × 10 would suggest a very different dumbbell, and 20 kg × 20 would hide how the reps were split.

This is a record-keeping convention, not a universal measure of total work. If you use a separate volume calculation, state its rule clearly and keep it consistent. For a simple way to total weighted entries without mixing the meaning of a set, see our workout-volume calculator guide.

A worked single-arm dumbbell row example

Imagine three rounds of single-arm dumbbell rows. You use 20 kg on both sides for the first two rounds. On the final round, the right side completes one fewer rep. Your log can stay compact:

Next time, you can see the starting load, the planned repeat target, and the one result that changed. You do not need separate exercise names such as "left row" and "right row" unless your programme deliberately treats them as different movements.

What should you write when your left and right sides differ?

Write exactly what each side completed. Do not turn 10 left, 8 right into an average of nine, and do not force the next set to match a number your body did not complete. A clean record could look like this:

Single-leg leg curl, set 2
Left:  30 kg × 10
Right: 30 kg × 8
Note: right side ended at 8 completed reps

Keep the note short and factual. A log can flag a difference worth discussing with a qualified coach or clinician, but it cannot diagnose why it happened or tell you what rehabilitation to follow. If a movement causes pain, stop and seek appropriate professional guidance.

How do you log unilateral exercises in PeakBFF?

PeakBFF recognises unilateral exercises in its workout library. When you add a set for one of those exercises in an active workout, it creates a paired left and right row under one set number. The row labels make it clear which side you are entering, and the previous values are kept separately for each side. That means you can log 20 kg × 10 on the left and 20 kg × 9 on the right without creating duplicate exercises or doing mental arithmetic.

Use the normal workflow: choose the exercise, add the set, enter the completed load and reps for each labelled side, and save the session. PeakBFF keeps the paired results in the workout history, so your next comparison starts with the same left-and-right structure. The app can also keep your wider workout history and nutrition log together. For a broader product decision, see the complementary gym tracker app comparison.

The bottom line

Log one numbered set for the left-and-right pair. Use the load held by one side, record that side's completed reps, and preserve any difference instead of doubling or averaging it away. This small rule makes single-arm and single-leg entries much easier to repeat and compare.

Download PeakBFF for iOS or Android to keep left-and-right workout records in the same place as the rest of your training history.