Testing protocol · Jumps
Single-leg CMJ and interlimb asymmetry
A countermovement jump on one leg, direct height in centimetres for each side, in three attempts. Interlimb asymmetry is calculated against the side that jumped higher. It does not classify risk.
Version 3 of the protocol in the StatsCenter catalogue.
Calculator
Interlimb asymmetry from each leg's height
The formula
Interlimb asymmetry = (higher − lower) ÷ higher × 100
Bishop, Read, Lake, Chavda & Turner (2018), Strength and Conditioning Journal 40(4):1–6. The equation estimates; it is not a clinical report and does not replace a direct measurement. It is the same calculation StatsCenter applies when a club collects.
Result
When collecting
What StatsCenter records and calculates.
Read from the product's protocol catalogue, in the version a club uses today when it creates an assessment.
Measures
- Jump height, right leg
- cm · the highest attempt counts
- Jump height, left leg
- cm · the highest attempt counts
Collection conditions
- Arms, free leg and how height is calculated
- Described by the club when collecting. Must match for two collections to be compared.
- Instrument
- Listed: contact mat, force plate, app (MyJump) and no technology; another can be described. Must match for two collections to be compared.
Derived values
Interlimb asymmetry
%- Equation
- (higher − lower) ÷ higher × 100
- Sign
- positive when the right leg jumped higher, negative when the left did
Interlimb asymmetry in unilateral tests. Bishop, Read, Lake, Chavda & Turner (2018), Strength and Conditioning Journal 40(4):1–6. Source
Protocol reference
- Interlimb Asymmetries: Understanding How to Calculate Differences From Bilateral and Unilateral Tests. The basis of the asymmetry equation in unilateral tests; it sets no risk threshold, which is the club's to declare.
Other protocols
Who uses it at the club
Collect your squad's single-leg CMJ in StatsCenter.
The protocol comes ready, with its attempts, its formulas and every athlete's history.
No card needed, every module included. Sign-up and the product are in Portuguese.