Sports
Training Volume Performance Calculator
Quantify session-RPE training load, resistance-training tonnage, monotony, strain, and workload change with a live seven-day microcycle profile.
Workload ledger
Build the week from session dose and resistance volume
Session-RPE load and lifted tonnage answer different questions, so this calculator keeps both visible.| Quantity | Current formula path | Current result | Interpretation |
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Microcycle view
Weekly dose, recovery gaps, and prior-load reference
Detailed calculation process
From one session to the complete weekly load
The session-RPE method multiplies whole-session duration by the athlete’s retrospective effort rating. Resistance tonnage separately multiplies exercises, sets, repetitions, and average external load. Neither measure is an injury prediction.
Ls = t × RPELw = n × LsNrep = n × e × s × rV = Nrep × mΔL% = (Lw − Lprev) / Lprev × 100What each symbol means
Worked substitution with the current inputs
- One session: 75 min × 6.5 = 487.5 AU.
- Weekly internal load: 4 × 487.5 = 1,950 AU.
- Working repetitions: 4 × 6 × 4 × 8 = 768 reps.
- External tonnage: 768 × 52.5 kg = 40,320 kg.
- Reconciliation: 1,950 AU versus 1,800 AU last week = +8.3%.
Practical examples
Where this model helps
- A strength coach can separate rising external tonnage from a stable perceived load.
- An endurance athlete can compare mixed cycling, running, and gym sessions on one internal-load scale.
- A return week can be compared with the athlete’s own previous week instead of an unrelated population benchmark.
Interpretation and measurement
Use consistent observations
- Collect session RPE after the session rather than rating only the hardest interval.
- Use the same convention for warm-up and cool-down duration each week.
- Average load is a simplification; use exercise-level tonnage when load varies widely.
Limitations
Session RPE is subjective and can be influenced by sleep, heat, illness, mood, and familiarity with the scale. Tonnage does not capture range of motion, velocity, exercise selection, eccentric demand, or bodyweight work. The percentage change is descriptive, not a safe/unsafe threshold.
Key terms
Internal load: the athlete’s response to training. External load: physical work completed. AU: arbitrary units created by multiplying minutes and RPE.
Training volume performance FAQ
Is a higher weekly load always better?
No. A useful load is one the athlete can absorb while meeting the purpose of the training phase. More load can reduce performance when recovery is inadequate.
Why are AU and kilograms not combined?
They measure different constructs. Adding them would create a number with no defensible unit.
Does this calculator predict injury?
No. It summarizes entered workload. Injury risk depends on many clinical, training, environmental, and individual factors.
What if the previous weekly load is zero?
A percentage change has no valid nonzero comparison basis. Treat the current week as a new baseline and retain the absolute AU value instead of interpreting the displayed zero-percent fallback as no change.
Method reference: Foster et al., “A new approach to monitoring exercise training,” Journal of Strength and Conditioning Research 15(1), 2001.