Sayers Vertical Jump Power

Estimate vertical-jump peak power with the published Sayers regression.

Description

The Sayers jump-power regression estimates peak power from jump height and body mass.

The Sayers jump-power regression estimates peak power from jump height and body mass. The published equation was derived from squat-jump data.^{[1, 2]}

Estimate vertical-jump peak power with the published Sayers regression.

When to use Sayers Vertical Jump Power

Use this tool to estimate vertical-jump peak power with the published Sayers regression.

Prepare the measured movement, timing, load or preassigned score requested. Keep protocols, units, paired measurements and caller-selected thresholds consistent.

How to use Sayers Vertical Jump Power 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 estimatedPeakPowerW. 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 jump cm and mass kg. Return the regression estimate; small inputs can produce negative watts.

estimatedW=60.7heightCm+45.3massKg−2055

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
estimatedPeakPowerW	Estimated peak power w	number

json

{
  "input": {
    "jumpHeightCm": 40,
    "bodyMassKg": 70
  },
  "output": {
    "estimatedPeakPowerW": 3544
  }
}

Limitations and assumptions

This is an empirical estimate, not a force-platform measurement. Protocol and population applicability must be assessed separately.

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 Harman Jump Power Comparison: Compare Harman and Sayers peak-power regression estimates for the same jump. For a complementary task, use Vertec Jump Reach: Compute Vertec vertical-jump height from standing reach and highest touch.

Further background: Cross-validation of three jump power equations.

References

Sayers Vertical Jump Power — tool.io
Cross-validation of three jump power equations — Sayers and colleagues

Similar or alternative tools

Harman Jump Power Comparison
Compare Harman and Sayers peak-power regression estimates for the same jump.
Vertec Jump Reach
Compute Vertec vertical-jump height from standing reach and highest touch.