Using Vertical Jump Data to Guide Your CrossFit Training

What is Peak Power Output?

Peak Power Output (PPO) is the measure of an athlete’s absolute power that is obtained by factoring in the vertical jump (measured in centimeters) and body weight (measured in kilograms).In CrossFit, athletes need to have the ability to control and decelerate their body weight while performing a functional movement like a squat or to perform explosive movements like an Olympic lift. The push­ off that occurs during explosive movements is all about absolute power.

These combined PPO variables, factoring in an athlete’s body weight and vertical jump height, demonstrate how a heavier athlete would have to do more work to move their larger mass through the air compared to a lighter person.

How is this applicable to CrossFit?

The data from measuring Peak Power Output allows coaches to compare their athletes using an “apples to apples” metric. From this valuable information, coaches are able to determine their most powerful athlete in the gym. Coaches are also able to monitor their athlete’s body weight for any changes if there is an increase in power output. This information can provide insight and help guide decision making if there is a need to improve an athlete’s rate of force development.

How is Peak Power calculated?

The Sayers Equation (1) estimates Peak Power Output (Peak Anaerobic Power output or PAPw) from the vertical jump and it is the equation the SMARTJUMP System uses.

PAPw (Watts) = 60.7 ∙ jump height(cm) + 45.3 ∙ body mass(kg) ­ 2055

Example

PAPw = (60.7 x jump height(cm)) + (45.3 x body mass(kg)) ­ 2055

PAPw = (60.7 x 36) + (45.3 x 100) ­ 2055

PAPw = 2185.2 + 4530 ­ 2055

PAPw = 4660.2 Watts

(1) Sayers, S., et al. (1999) Cross­validation of three jump power equations. Med Sci Sports Exerc. 31: 572.