Hong Life CalculatorsUnderstanding the progressive overload planner — concept and principle
Progressive overload means making training gradually harder so the body keeps adapting. This planner shows where a weight ends up if you raise it by a fixed percentage every week, and lists each week's target. It helps you check whether a goal is realistic before you commit to it, and gives a simple week-by-week path to follow.
How it is calculated
Weight after w weeks = current weight × (1 + increase ÷ 100)^w
Total increase = ((1 + increase ÷ 100)^w − 1) × 100 %
- Weight now: your current working weight for the lift, in kg or lb.
- Increase per week: the percentage added each week.
- Weeks: the length of the plan.
The week-by-week list shows each week's weight rounded to one decimal.
The principle
Each week's increase is applied to the previous week's weight, not to the starting weight, so the growth compounds in the same way as interest in a savings account. That is why 8 weeks at 2.5% gives almost 22%, not 20%. Compounding is fine for short plans but quickly becomes unrealistic over long ones: 2.5% a week for a full year would multiply the weight by more than three. In reality, progress slows as you approach your potential, so the model is best for short beginner or peaking blocks.
Worked example
- Inputs: 60, 2.5% per week, 8 weeks.
- Growth factor: 1.025^8 ≈ 1.21840.
- Weight at the end: 60 × 1.21840 ≈ 73.1.
- Total increase: (1.21840 − 1) × 100 ≈ 21.84%.
- Weekly targets: 1: 61.5 · 2: 63 · 3: 64.6 · 4: 66.2 · 5: 67.9 · 6: 69.6 · 7: 71.3 · 8: 73.1.
| Weight now | Weight at the end |
|---|---|
| 15 | 18.28 |
| 30 | 36.55 |
| 45 | 54.83 |
| 60 | 73.1 |
| 75 | 91.38 |
| 90 | 109.66 |
| 120 | 146.21 |
How to read the result
Round each target to the nearest weight you can load; with 2.5 kg steps, a small weekly percentage may mean repeating a weight for a week. If you miss a target, repeat it or reduce the rate rather than forcing the next jump. Beginners can often add 2.5–5% a week on major lifts for a while; intermediate and advanced lifters may progress by that much in a month or a whole training block. Overload can also come from more reps or sets at the same weight.
Common mistakes
- Planning many months of steady percentage gains.
- Ignoring plate rounding, so planned and loaded weights drift apart.
- Increasing the weight while form gets worse.
- Treating a missed week as failure instead of a normal part of training.
Frequently asked questions
How much should I increase per week?
Beginners often manage 2.5–5% on large lifts; the ACSM suggests raising the load by about 2–10% once you can do one or two reps beyond the target.
Why does the final weight exceed a simple percentage sum?
Because each increase is applied to an already increased weight, the gains compound.
What if the rounded weight stays the same two weeks in a row?
Keep it and aim for an extra rep; the next week will catch up with the plan.
Sources: American College of Sports Medicine, Progression models in resistance training for healthy adults, Medicine & Science in Sports & Exercise, 2009