RepolveGet the appREPOLVE RESEARCH / 01
Progressive Overload: Should You Add Weight or Reps?
The plates stayed the same. That does not mean your training stood still.
THE SHORT ANSWER
Adding repetitions can be a meaningful form of progression. In one eight-week lower-body trial, progressing reps and progressing load produced broadly similar muscle growth.
What did the research find?
Researchers randomized 43 trained adults to increase load or repetitions; 38 completed the study. They trained twice weekly for eight weeks using lower-body exercises. Most muscle-thickness outcomes were similar between groups. A rectus femoris result favored rep progression, but the authors described it as preliminary. Load progression showed a slight advantage for maximal strength, with uncertainty around that estimate.
What this does not prove
This was a short lower-body study, not proof that both methods are identical for every muscle or goal. The bench-press example in the video is an illustration, not an exercise tested in this experiment.
What counts as progressive overload?
Progressive overload describes increasing the training demand as you become able to handle more. Load is easy to see, which makes it tempting to treat every unchanged plate as a stalled workout. A log can capture another kind of change: completing more repetitions under comparable conditions.
A practical example: 185 × 8 becomes 185 × 10
Imagine logging eight bench-press reps at 185 lb, then ten reps with the same load on a later session. If your technique, range of motion and estimated effort are comparable, that is useful performance progress. If the extra reps came from shortening the movement or pushing much harder, the comparison is less straightforward. These numbers are an example, not a prescription.
Make your next comparison fair
Record load, completed reps and how many good reps you think remained. Compare the same exercise and setup across multiple sessions. A single tired day does not tell the whole story. You can then decide whether your next progression is another rep or a small load increase within your program.
Does this mean you should never add weight?
No. The useful choice is not “reps forever” versus “plates every session.” Both give you something measurable to progress. If lifting a heavier maximum is your priority, keep that goal visible when interpreting your training.
PUT IT IN YOUR LOG
Give your next workout some context.
Repolve helps you log sets, reps and weights, then follow your strength progress over time. Supported exercises contribute to a personalized Strength Profile and an overall Strength Score—estimates of logged strength performance, not measurements of muscle growth. The earlier video describes adaptive training as a direction; personalized programming remains beta, and this page does not promise automatic adaptation.
Get Repolve for iPhone ↗Video transcript
You're probably doing progressive overload wrong. Progressive overload doesn't mean more weight. Most lifters think progression means one thing... add more weight. But that's not actually what the research says. Researchers took trained lifters, and compared two ways of progressing. One group increased the weight. The other increased their reps. After eight weeks, both produced similar muscle growth. Progress isn't the plate going up every workout. It's performance, over time. One-eighty-five for eight. Then one-eighty-five for ten. Same effort. That's progress too. Past the beginner stage, it matters more. Because performance is noisy. Some days you sleep badly. Some days you're fatigued. Some days, you're simply stronger. So blindly adding weight isn't personalization. The better question: what did you do? How hard was it? What should change next? That's one of the problems we're researching while building Repolve. Your training should adapt to you. Not the other way around.
Source & editorial note
Repolve Research explains published exercise science and connects it to workout tracking. This is an editorial summary by the team behind Repolve, not a new study or an independent review of the app. Practical examples are illustrations, not tested results. Report a correction.
Video motion-capture data: CMU Graphics Lab Motion Capture Database, created with funding from NSF EIA-0196217.