Slide Ratio

By the Watta Team · Updated

Slide Ratio: Slide ratio is the timing relationship between the drive and recovery phases of the rowing stroke, ideally approximately 1:2 (drive to recovery).

What is Slide Ratio?

Slide ratio measures the time spent on the drive relative to the recovery. A ratio of 1:2 means the recovery takes twice as long as the drive — this is the target for most rowing. At 20 strokes per minute, each stroke cycle is 3 seconds: 1 second drive, 2 seconds recovery. Good slide ratio creates rhythm, reduces energy waste, and allows the flywheel to decelerate naturally between strokes. Poor slide ratio (rushing the recovery, approaching 1:1) increases fatigue, disrupts timing, and creates a harsh, jerky catch. Slide ratio naturally shifts during racing — at 32+ spm the ratio approaches 1:1.5 — but for training and steady state, maintaining 1:2 is critical for efficiency and injury prevention.

How Watta Uses Slide Ratio

Slide ratio is reflected in the stroke rate data Watta captures. Consistent stroke rates at target power suggest good rhythm and slide ratio. The Economy component of the Effort Score rewards efficient stroke patterns.

Further Reading

Frequently Asked Questions

What is the ideal slide ratio?
Approximately 1:2 (drive to recovery) for training rates of 18-24 spm. At higher racing rates (28-36 spm), the ratio naturally compresses towards 1:1.5. The drive should always be quicker than the recovery.
How do I improve my slide ratio?
Use a metronome app set to your target rate. Practise pause drills: row with a 2-second pause at the finish to enforce a slow recovery. Focus on the cue "quick hands, slow slide" during every stroke.
Does the PM5 show slide ratio?
Not directly. The ErgData app can display drive time and recovery time, from which you can calculate ratio. On the PM5 alone, monitoring stroke rate consistency is the best proxy for good slide ratio.

Related Content

Stroke RateStroke rate, or strokes per minute (SPM), is the number of complete rowing strokes you take in one minute on the ergometer.The RecoveryThe recovery is the non-power phase of the rowing stroke where the rower returns to the catch position, following an arms-back-legs sequence.The DriveThe drive is the power phase of the rowing stroke where the rower pushes with the legs, swings the back, and pulls with the arms to accelerate the flywheel.Effort Score CalculatorErg Technique GuideFor Rowing CoachesFor Beginners
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