What you log depends on whether each side of your body moves its own weight or both sides move one shared weight. This applies whether you train one side at a time (unilateral, e.g., single-arm rows) or both sides at once.

Important: “One side” always refers to your body – not to the left or right side of a machine.

Example 1: Dumbbell bench press

You use a 90 lbs/kg dumbbell in each hand → enter 90 lbs/kg.

Example 2: Incline dumbbell curls

You use 20 kg per arm → enter 20 kg, not 40 kg – even though both arms are working at the same time.

On many plate-loaded machines, all plates sit on one lever arm or sled (e.g., leg press, hack squat, T-bar row). Here, always log the total weight of all plates you’ve loaded. The weight of the sled or lever arm itself is not counted – it’s often unknown and varies from machine to machine. It doesn’t matter how you distribute them between the left and right side – the machine moves as one unit, so you’re always working against the full load.

Example: Leg press

You load 2 × 20 kg plates on the left and 2 × 20 kg plates on the right → enter 80 kg (not 40 kg).

This also applies to single-leg variations: On a single-leg leg press, your working leg moves the entire sled – so log the total weight here, too.

Exception: machines with adjustable resistance profiles

On some machines – e.g., from Prime – the position of the plates shifts the resistance toward the stretched (“stretch”) or the contracted (“squeeze”) position. The same total weight can then feel very different.

Still log the total weight, and load the machine the same way every session so your tracking stays consistent.

Create a separate Custom Exercise for each setup you use (e.g., “Prime Chest Press – Stretch”). → Create and manage custom exercises

Logging one side keeps your training data comparable – no matter whether you train one or both sides at a time. Adding up both sides isn’t wrong per se, but then you need to stick with it permanently for that exercise. Switching between both methods distorts your progress data.

One set = both sides: Train one side, then the other – together, they count as one set in the app. Log the reps of one side.

The same applies if you alternate left and right within a set (e.g., alternating dumbbell curls): log the weight per side and the reps per side.

Example: 10 reps per arm → log 10 reps, not 20.

Minor differences between your left and right side are completely normal. To avoid or reduce larger imbalances, we recommend:

On very heavy sets, a short 15–30 second pause before switching sides can help you maintain your performance. Learn more in Adjusting Rest Times.

Unilateral training takes a bit more time, but it can be worth it: due to a phenomenon called the bilateral deficit, you can sometimes produce slightly more force with one side alone than when training both sides together. For muscle growth, however, unilateral and bilateral training are similarly effective when total training volume is matched.

So feel free to combine both – e.g., 6 weeks of mostly bilateral work, then 6 weeks with more unilateral training. This way, you use potential strength advantages and keep your training varied.