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Volume & Work

Volume (Total Reps)

Also known as: Training Volume, Rep Volume, Work Volume

The total number of repetitions performed in a session, aggregated across all exercises. Volume is the most fundamental "how much work did you do?" metric.

Formula

Volume = sets x reps (per exercise, summed across session)

Example

Bench Press: 4 x 8 = 32 reps. Rows: 3 x 10 = 30 reps. Curls: 3 x 12 = 36 reps. Session volume = 98 reps.

How Afitpilot Uses This

We normalize planned reps (handling ranges, per-side notation, and non-numeric values) and compare against actual reps logged. A coverage gate requires at least 50% of exercises to have normalizable planned reps before showing the comparison. Deviations are flagged at 10% (amber) and 25% (red).

Typical session & weekly rep volume

Who / ContextValueNote
Powerlifter (heavy day)80-150 reps/sessionLow reps, high intensity
Bodybuilder / hypertrophy200-350 reps/sessionHigh reps, moderate weight
Regular gym goer (3x/wk)150-250 reps/session (450-750/wk)Full-body or split
Hybrid athlete100-200 reps/sessionLower — stress split with cardio
Active aging (60+)80-150 reps/session (200-450/wk)Higher-rep sets (12-15) preferred for joint safety
Marathon runner~42,000 strides per raceExtremely low-load, extreme volume

Known Limitations

  • •Volume counts only repetitions — it doesn't distinguish between a 3-second rep and a 6-second eccentric tempo rep. Time-under-tension is invisible to this metric.
  • •Time-based exercises (planks, carries, isometric holds) are completely excluded because they don't have a rep count. This can understate total work for sessions heavy on conditioning or core work.
  • •Rep range prescriptions like "10-12" are normalized to the midpoint (11), which is a simplification. The athlete may consistently hit the top or bottom of the range.
  • •AMRAP, EMOM, and "to failure" prescriptions are excluded from planned volume since there's no deterministic target.

What We're Improving

  • Future

    Effective Sets (Hard Sets) Tracking

    Track sets taken within 0-3 RIR of failure separately from total sets. Research increasingly suggests that "hard sets" are a better predictor of hypertrophy stimulus than total volume. This would give a more nuanced view of training dose.

  • Future

    Per-Muscle-Group Weekly Volume

    Aggregate weekly set volume by muscle group using our exercise library classifications. This would let us flag under- or over-trained muscle groups relative to evidence-based guidelines (10-20 sets/week).

  • Future

    Time-Based Volume Equivalents

    Convert time-based exercises (planks, carries, isometric holds) into a volume-equivalent metric so they stop being invisible in session totals. Likely a time-under-tension proxy.

Science Context

Total repetition volume is one of several ways to quantify training volume. Research increasingly suggests that "hard sets" (sets taken close to failure) may be a better predictor of hypertrophy than total reps (Krieger, 2010). We currently track total reps rather than effective sets, which is a simpler but less nuanced approach.