The Problem With Fast Cadence
Many indoor cyclists can hold 100 rpm for 30 seconds, but their hips rock and their feet lose smoothness after two minutes. The problem is not leg speed; it is late stability. A rider who chases cadence before controlling the pelvis spends energy bracing against the saddle instead of driving the pedal. The fix is short, repeatable cadence blocks with a clear ceiling, not one long effort at maximum rpm.
How the Spinpolo Drill Is Built
The Spinpolo cadence drill uses three four-minute blocks at 80, 90, and 100 rpm. Each block alternates 30 seconds seated with 30 seconds standing, then repeats four times. Resistance stays light enough that the rider can complete the final 30 seconds without grinding. The public Spinpolo session notes at spinpolo recommend setting a hard cap: if the hips rock twice in a row, reduce cadence by five rpm and rebuild. That cap turns a speed test into a control test.
Three Cues That Fix Saddle Bounce
Use one cue at a time so the rider can process the correction:
- Keep the hands loose on the bars; a white-knuckle grip usually signals a tense lower back.
- Pull the belly button gently toward the spine and think of the pelvis as a bowl that must not spill.
- Finish each pedal stroke by sweeping the foot forward at the top, which reduces the dead spot.
In a group class, the coach can watch for these three markers and correct one at a time, because three simultaneous cues overwhelm most riders.
Measuring Progress Without a Power Meter
Use two simple numbers: average cadence across the 12 minutes and the number of visible hip rocks per block. A useful target is a five-rpm increase at the same perceived effort after four weeks, with fewer than three rocks in the 100-rpm block. Riders who only record peak cadence miss the point; a clean 95 rpm beats a messy 110 rpm for road endurance. Keep the same resistance and saddle height for each test so the comparison is fair.
When to Skip the Drill
Skip Spinpolo cadence work on the same day as heavy squats or long hill repeats, because pre-fatigued legs turn the drill into a grind. Riders returning from knee pain should start with the 80-rpm block only and add the higher blocks after two pain-free sessions. The drill is a skill session, not a fitness penalty; if form breaks, end the block early and note the cadence where it happened.