heala
Training · 3 min read
Progressive overload has 5 dials, not 1
Adding weight is one way to make training harder — not the only one. Load, reps, sets, tempo and range each move the stimulus, in very different step sizes. What each dial does, when it sticks, and the order worth turning them in.
The one-dial habit
Progressive overload usually gets read as one instruction: add weight. Load is one dial of five. The smallest plates in most gyms are 1.25 kg — a 2.5 kg jump, or +2.5% on a 100 kg lift. Compound that weekly and you would double your squat in 28 weeks. Nobody does. When the plate jumps stop landing, most lifters conclude they have plateaued. Usually they have run one dial to the end of its thread and left four untouched.
What each dial moves
Load raises intensity: the same movement against more resistance. Reps and sets raise volume: more total work at the same intensity. Tempo raises time under tension: a 3-second rep becomes a 4-second rep, and the set lasts a third longer at the same weight. Range raises work per rep: two centimetres deeper on a squat is more distance moved under the same bar.
They are not interchangeable. Meta-analyses tie muscle growth most closely to weekly hard sets, and heavier loads to strength; rep duration matters surprisingly little across a wide band. A number on one dial cannot tell you what the others are doing — 3×8 at 60 kg through half the range is a lighter session than the log line suggests.
The step sizes are not equal
Each dial has a minimum honest increment, and they differ by an order of magnitude. Load moves in 2.5% steps. A deeper range adds perhaps 5%. One extra rep on a set of eight is +12.5%. One extra set on three is +33%, and one added second on a 3-second rep is +33% more time under tension. The chart cannot tell you which jump you will recover from — only that the right-hand dials are coarse. A +33% click is not a weekly move; it is a monthly one.
An order worth following
Double progression uses two dials on purpose: hold load, add reps until the top of a range — say 8 to 12 — then add load and drop back to 8. Sets move on a block timescale: add one when growth stalls for weeks, not because a session felt easy. Between them, those three dials cover most of a training year.
Tempo and range are the quiet dials, for lifts stuck past a month; slower reps also keep the load lighter, which cranky joints often prefer — though pain that persists across sessions is a question for a clinician, not a loading scheme. And none of the five will turn if recovery is the limiter — a stalled dial sometimes means a short night, not a weak muscle.
Turning them in order
Take the 2.5% plate jump while every rep stays clean. It is the finest dial you own — use it until it sticks.
Load stalled two sessions in a row? Hold the weight and add one rep per set until you reach the top of your range.
At the top of the range everywhere, add one set and drop back down. That click is +33% — give it weeks, not days.
Slower eccentrics and deeper positions are for plateaus past a month — monthly experiments, not weekly clicks.
Quick answers
Do I have to add weight every session?
No, and you cannot for long: +2.5% a week doubles a lift in 28 weeks, which nobody sustains past the novice phase. Load leads while it moves. When it stalls, reps and sets carry progression at the same weight — that is the point of having five dials.
Which dial matters most for muscle growth?
Meta-analyses (Schoenfeld et al., 2017) tie growth most closely to weekly hard sets — the volume dials. Load matters more for strength. But those comparisons assume the dial still turns. For a stalled lifter, the best dial is whichever one still moves this week.
Does slowing the tempo build more muscle?
Not by itself. A meta-analysis of repetition duration (Schoenfeld, Ogborn and Krieger, 2015) found similar growth across roughly 0.5 to 8 seconds per rep. Tempo is useful because it adds time under tension without adding load — a dial for cranky joints and stubborn plateaus, not a multiplier.
Heala opens 1 October 2026
Free forever — Pro is optional.
Photo food logging, adaptive training, a morning recovery score and a 3D body twin, in one app. Join the list and your spot — and your founding discount — are saved.
- 15% off for life · first 1,000 members
- Reserve your @username
- One email at launch · no newsletter
- Two hard sets do most of what five doMuscle growth rises with every set you add, but each one buys less than the last. Two honest sets near failure…
- The last rep before failure is worth more than the firstTen reps are not ten equal reps. Muscle fibres are recruited in order, and the reps that recruit the biggest o…
- How long a muscle actually needs between sessionsMuscle protein synthesis runs for roughly 24–48 hours after a hard session, longer after heavy eccentric work.…