power output in kg•m/s =

= SQRT (4.9) * (weight in kilograms) * SQRT (distance jumped in meters)

power output in ft•lb/s =

= 4 * (weight in kilograms) * SQRT (distance jumped in feet)

where:

• SQRT indicates the square root function

1 watt =

= 9.80665 kg•m/s

= 1.35582 ft•lb/s

factor to convert kg•m/s to ft•lb/s: multiply by 7.233

factor to convert kg•m/s to horsepower: multiply by 0.0131

factor to convert ft•lb/s to horsepower: multiply by 0.0018

Note to Fox (1984):

• The conversion factor between kg•m/s and ft•lb/s given as 7.32, but the value given above can be derived from the units themselves or is given in tables (Weast, 1979).

• The units for distance jumped are not given, but meters and feet appear to agree with the nomogram.

• The metric equation seems to agree better with the nomogram.

Limitations (Harman et al, page 117):

• The formula does not use standard units.

• Gravity is not accounted for.

• It is unclear if the test measures peak or average power.