Why warm-up sets matter
Jumping straight to your working weight is one of the most common ways to tweak a back or shoulder. Warm-up sets raise your body temperature, let you rehearse the movement and get your nervous system used to heavier loads. A good warm-up does all of that without draining the energy you need for your real sets.
How the warm-up is built
The calculator starts with the empty bar, then climbs in steps of roughly 40%, 60%, 80% and 90% of your working weight. The reps drop as the weight goes up, so the heaviest warm-ups are just a couple of reps.
- Heavy working sets (1–3 reps): an extra single near 90% so the heavy weight doesn't feel like a shock.
- Medium sets (4–6 reps): the standard ramp, finishing around 80–85%.
- Higher-rep sets (8+): fewer, lighter warm-ups, since the working weight is already moderate.
Weights are rounded to what you can actually load with standard plates. Any warm-up step that would be lighter than the bar is skipped.
Frequently asked questions
How many warm-up sets should I do?
Usually 3–5. The heavier your working weight compared with your max, the more steps you need to get there comfortably.
Do warm-up sets make me tired?
Not if the reps drop as the weight climbs. Low-rep warm-ups prepare you without using up energy you need for your working sets.
Should I stretch before lifting?
Long static stretches right before heavy lifting can slightly reduce strength for some people. Light movement and warm-up sets are a better use of your time.
Warm-up tips
- Do 5 minutes of light cardio or mobility work first if you're coming in cold.
- For the first lift of the day, use the full warm-up. For later lifts that use the same muscles, you can skip the lighter sets.
- Treat every warm-up rep like a working rep: same setup, same depth, same bar path.
Not sure which plates go where? The plate calculator draws the loaded bar for any weight.
