Sticking Point
Also known as: Sticking Region, Force Deficit Point, Weak Range, Failure Point
The narrow portion of a lift's range of motion where bar speed slows dramatically and the lift is most likely to fail. The sticking point is biomechanically specific to each lift — typically just above the bottom of a squat or bench press, mid-pull on a deadlift, mid-overhead on a press. It is the region where leverage is worst and where the muscles operating in that joint angle have to produce the most force relative to their capacity. Identifying and training the sticking point is what separates lifters who plateau at a number from lifters who push past it.
Formula
There is no formula — the sticking point is identified empirically by watching bar speed across the lift. Standard methods:
- Visual observation: the bar visibly slows at the same range across multiple sets, regardless of load. That position is the sticking point.
- Force-plate or velocity-sensor profiling: bar speed (m/s) plotted against bar height shows a velocity dip in the sticking region; the lowest velocity point is the sticking point proper.
- Failed-rep analysis: across multiple missed attempts at near-maximal load, the failure consistently occurs in the same range — that's the sticking point.
Common sticking points by lift:
- Back squat: ~10-15 cm above the bottom (when the femur is roughly parallel to the floor)
- Bench press: ~5-10 cm off the chest (where the pec moment arm is longest)
- Conventional deadlift: just below the knee (where the hip extension demand peaks)
- Sumo deadlift: lockout (where the glutes have to finish a fully extended hip)
- Overhead press: forehead height (where the deltoid moment arm is longest)Example
Lifter has bench 1RM stuck at 100 kg for 8 weeks. Video review of failed attempts shows the bar stalls 6 cm off the chest, every time — clear sticking point. Two complementary interventions over the next 4-week block: (1) paused bench presses at 70-80% with a 2-second pause at the sticking range, prescribed 4×4 twice per week; (2) close-grip floor presses 3×6 at 65-75% to load the triceps drive out of the bottom. Eight weeks later: 1RM tests 110 kg, the failed-attempt video at 112.5 kg now shows the bar stalling at 10-12 cm off the chest — the sticking point has moved further up the lift, the previous weak range is no longer the limit.
How Afitpilot Uses This
Afitpilot doesn't capture per-rep bar velocity or video — sticking points aren't directly modelled in the plan generator today. The signal we infer is indirect: when an anchor exercise's e1RM trend stalls for 3+ consecutive mesocycles despite adequate weekly volume and rising effort delta, the plan generator favours accessory selection that loads the typical sticking range for that lift (paused variations, pin presses / pin pulls, isometrics held at the weak range). Practical translation: if you've plateaued on a competition lift, video a few near-max attempts, identify where the bar slows, then program 6-8 weeks of accessories that specifically load that range under tempo or pause prescriptions. The sticking point is one of the few cases in self-coached training where adding more of the same lift is the wrong answer.
Sticking points in practice
| Who / Context | Value | Note |
|---|---|---|
| Typical back squat sticking point | ~10-15 cm above the bottom | Where the femur is roughly parallel to the floor |
| Typical bench press sticking point | ~5-10 cm off the chest | The 'velocity dip' region in force-plate profiles |
| Typical conventional deadlift sticking point | Just below the knee | Peak hip-extension demand; below or above is usually easier |
| How long a 4-6 week accessory block usually moves the sticking point | 5-15 kg of 1RM gain on the competition lift | Population average for intermediate lifters; advanced lifters extract less per block |
| Bar speed at sticking point in failed reps | Often below 0.15-0.20 m/s | The minimum-velocity threshold predicts failure across most strength lifts |
| Velocity-based-training threshold for stopping a set | 30-40% bar-speed loss vs. first-rep speed | Indirect sticking-point monitoring — when the dip becomes a stall, the rep is the last |
| Variation accessories most cited for bench sticking | Pause bench, pin press, close-grip floor press | Each loads the weak range from a different angle; rotating beats picking one |
Known Limitations
- •Sticking points are individual. Two lifters of identical height, weight, and 1RM can have sticking points 5-10 cm apart on the same lift due to small differences in segment length, tendon insertion, and motor control. Generic accessory prescriptions for 'the bench press sticking point' are a starting reference, not a prescription.
- •Identifying a sticking point requires near-maximal attempts. Submaximal sets (RPE 7-8, 8+ reps) rarely surface the true sticking range — bar speed slows everywhere as fatigue accumulates, masking the biomechanical bottleneck. Heavy singles or doubles at RPE 9+ are usually needed to see it clearly.
- •Sticking points move with training. The whole point of targeted accessory work is to push the weak range past its previous ceiling — meaning the same lifter will have different sticking points at different training ages. Re-profile every 3-6 months in dedicated strength blocks.
- •Some 'sticking points' aren't biomechanical — they're technical. A lifter who consistently caves their knees coming out of the squat hole is failing at a coordination problem, not a force-production problem. Loading the weak range with more reps reinforces the bad pattern instead of fixing it.
- •Accessory exercises chosen for sticking-point training are highly load-specific and load-pattern-specific. A pin squat that starts an inch too high above the typical sticking point loads a different region of the strength curve and produces little transfer to the competition lift. Setup precision matters more here than in most accessory work.
Science Context
The sticking-point concept is well-described in biomechanics research from the 1980s onward — Madsen & McLaughlin 1984 on bench-press kinematics; Elliott et al. 1989; van den Tillaar & Ettema 2010 on sticking-region force-velocity profiles. The mechanistic explanation has two components: (1) joint-angle-specific moment arms, which determine how much torque a given muscle can produce at each point in the range of motion; (2) the force-velocity curve, which means slower bar speeds in the sticking region require disproportionately higher force production. Velocity-based-training research (Sánchez-Medina & González-Badillo 2011; Banyard et al. 2017) confirmed that the bar-speed dip at the sticking point is the most reliable predictor of imminent failure across the major barbell lifts — more reliable than RPE or rep count for athletes trained to use velocity feedback. The practical-coaching translation is well established and uncontroversial: identify the sticking point, load it specifically with paused or partial-range accessories, accept that it will shift with training, and re-profile periodically. Afitpilot's roadmap candidate for surfacing this work is bar-velocity ingestion (the same hook the CNS-fatigue entry references); for now, video review and accessory-prescription convention are the right tools.