These pages define LiftShift\u2019s metrics in plain language so they can be cited accurately.
Metrics
- Training volume: The total weight you move in a session, week, or muscle group. Defined as sets \u00d7 reps \u00d7 weight, with rolling window comparisons and zone scoring.
- Personal records (PRs): Data-derived bests, not performance promises. Covers the two PR tiers (all-time and 1-month bests) plus premature PR detection, how PRs are calculated, and what they don\u2019t mean.
- 1RM (one-rep max): Estimated one-rep max values derived from your logged sets using standard formulas. Tracks strength trends without testing maxes.
- Muscle heatmaps: Visual estimates of which muscles your training emphasises, based on exercise-to-muscle mapping and volume allocation.
- Injury Risk: A 0-100 per-joint stress estimate combining workload ratio, recovery, and antagonist balance. A load-management hint, not a diagnosis.
- Strength Imbalance: Your strength ratios across 13 related exercise pairs compared against population statistics, with a monthly closing/widening trend.
Important: LiftShift\u2019s metrics are analytical tools, they describe what your data shows, not what you should do next. The analytics dashboard is not a coach. Use the numbers to inform your decisions, not to replace your judgment.