AI quick summary
- The pedal stroke has 4 phases: downstroke (power phase, 12-5 o'clock), bottom (transition, 5-7), upstroke (recovery, 7-10), and top (transition, 10-12). The downstroke produces 80%+ of power; the other phases minimize losses
- The 'pedal circles' myth: research shows that even elite cyclists don't produce equal power through the full circle. They push down hard on the downstroke and actively un-weight (not pull up) on the upstroke. Trying to actively pull up is LESS efficient — it wastes energy on the hip flexors
- The two technique improvements that matter: (1) ankling (dropping the heel at the top, raising it at the bottom — increases effective lever length), and (2) smooth transitions at the top and bottom of the stroke (no dead spots)
- Single-leg drills: the best exercise for pedal stroke efficiency. Pedal with one foot unclipped for 30 seconds — the dead spots become immediately obvious. 3×30 seconds per leg, once a week
/ 01
The 4 phases
The pedal stroke broken into 4 phases (using clock positions).
| Phase | Clock position | What happens | Power contribution |
|---|---|---|---|
| Downstroke | 12–5 o'clock | Quads and glutes push down — the power phase | 80–90% |
| Bottom transition | 5–7 o'clock | Calf and foot angle push the pedal through the bottom | 5–10% |
| Upstroke | 7–10 o'clock | Hamstring lifts the pedal — or just un-weights it | 0–5% |
| Top transition | 10–12 o'clock | Hip flexor pulls the pedal over the top | 5% |
/ 02
The 'pedal circles' myth
Coaches used to teach 'pedal circles' — the idea that you should apply equal force around the entire 360 degrees of the stroke, pushing down AND pulling up. Power-meter research has debunked this: even elite cyclists don't produce equal force around the circle. They push down hard on the downstroke (producing 80%+ of power) and actively un-weight the rising pedal (not pulling up, just lifting the foot's weight so the rising pedal doesn't fight the downstroke).
Actively pulling up on the upstroke — using the hip flexors to pull the pedal up — IS possible, but it's energetically expensive. The hip flexors are small muscles with limited endurance; using them to pull up costs more oxygen than the power gain is worth. The efficient stroke: maximize the downstroke (the big muscles: quads, glutes), minimize the resistance on the upstroke (un-weight, don't pull), and smooth the transitions at top and bottom.
/ 03
Single-leg drills — the best technique exercise
Unclip one foot (rest it on a bottle cage or the chainstay) and pedal with the other leg only. Immediately, you'll feel the dead spots — the moments in the stroke where neither pushing down nor pulling up is happening (usually at the top, 11–1 o'clock). With a single leg, the dead spot causes the cadence to stutter. Your job: smooth it out by anticipating the transition — start pushing down earlier (at 11 o'clock) and ease off later (at 6 o'clock).
Protocol: 3×30 seconds per leg, at moderate cadence (80–90 rpm) and easy resistance. Focus on smoothing the top-of-stroke transition. Do this once a week, warm, as part of an endurance ride. Within 4–6 weeks, your pedal stroke measurably smooths — verified by a dual-sided power meter showing less left/right power fluctuation.
/ 04
Cadence and efficiency
Your optimal cadence depends on terrain, fitness, and individual physiology. The research consensus: higher cadence (90–100 rpm) is more efficient aerobically (less force per pedal stroke, less muscle fatigue) but less efficient mechanically (more energy spent on the upstroke to move the legs). Lower cadence (70–80 rpm) is more efficient mechanically but more fatiguing to the muscles.
Practical guidance: on flats and rolling terrain, aim for 85–95 rpm (the 'tempo' cadence — efficient and sustainable). On climbs, slightly lower (75–85 rpm) for more torque. In sprints, 100–120 rpm for maximum power. Don't force a specific number — find the cadence where you produce the most power for the least perceived effort. That's YOUR optimal cadence.
/ Sources