Harman Jump Power Comparison
Compare Harman and Sayers peak-power regression estimates for the same jump.
Description
Jump-power model comparison evaluates two fixed regressions on the same height and mass.
Jump-power model comparison evaluates two fixed regressions on the same height and mass. Model disagreement does not identify which estimate fits an individual.1
Compare Harman and Sayers peak-power regression estimates for the same jump.
When to use Harman Jump Power Comparison
Use this tool to compare Harman and Sayers peak-power regression estimates for the same jump.
Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.
How to use Harman Jump Power Comparison and understand its results
- Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.
- Enter jumpHeightCm, bodyMassKg using the field table and calculation rules, then run the tool.
- Read harmanPeakPowerW, sayersPeakPowerW, differenceW. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| jumpHeightCm | Jump height cm | number | Required |
| bodyMassKg | Body mass kg | number | Required |
Enter positive cm/kg measurements. Return both watt estimates and Harman-minus-Sayers difference.
Harman=61.9heightCm+36massKg+1822; Sayers=60.7heightCm+45.3massKg−2055 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| harmanPeakPowerW | Harman peak power w | number |
| sayersPeakPowerW | Sayers peak power w | number |
| differenceW | Difference w | number |
{
"input": {
"jumpHeightCm": 40,
"bodyMassKg": 70
},
"output": {
"harmanPeakPowerW": 6818,
"sayersPeakPowerW": 3544,
"differenceW": 3274
}
}Limitations and assumptions
Coefficients follow the committed implementation, including the positive Harman intercept. No force-platform validation, protocol correction or uncertainty is supplied.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Sayers Vertical Jump Power: Estimate vertical-jump peak power with the published Sayers regression. For a complementary task, use Takeoff Impulse Velocity: Convert net takeoff impulse to velocity and ideal ballistic jump height.
References
-
Harman Jump Power Comparison — tool.io
Similar or alternative tools
- Sayers Vertical Jump Power
Estimate vertical-jump peak power with the published Sayers regression.
- Takeoff Impulse Velocity
Convert net takeoff impulse to velocity and ideal ballistic jump height.