Complex Test
Gait Test
Jump Test
Run Test
Static Test

Counter Movement Jump

The test evaluates the lower body's explosive power. In particular, the test is applied to quantify jump performance related to an athlete's stretch-shortening cycle, resulting in the capacity to accelerate the body mass in the transition from eccentric to concentric movements.

Description

The counter movement jump is a double-legged plyometric jump test and involves squatting to a self-selected depth, instantaneously propelling upward into the air and landing on both feet. The test poses a stretch-shortening movement on the lower extremities as the eccentric squatting is followed by immediate concentric acceleration. Hands shall remain on the hip throughout the entire movement. 3 repeats are performed, the jump with the highest ReGo Score is evaluated. The goal is to jump as high as possible after squatting.

Test Preparation

  • Choose hard floor for testing
  • Wear sports clothing and shoes with little damping
  • Light meal before testing is acceptable, but not obligatory

Equipment

No equipment needed

Primary Outcome Parameter

Report ParameterUnitExplanation
RP-0142Jump HeightmMaximum height of a vertical jump. Represented by the change of the vertical position of the body between the instant of take-off and the peak positive vertical displacement.

Secondary Outcome Parameters

Report ParameterUnitExplanation
RP-0156Take-Off Velocitym/sThe vertical velocity of the system/body centre of mass at the instant of take-off.
RP-0150Time to Take-OffsThe total time taken from the initiation of movement to the instant of take-off.
RP-0158Unweighting Phase%The unweighting phase starts with the first movement downward of the system/body center of mass, resulting in a “fall like” movement and a vertical ground reaction force lower than the athlete’s body weight. It is defined by a negative velocity that is continuing to grow in magnitude. Indicated in % of total time from the initiation of movement to the instant of take-off.
RP-0151Braking Phase%Braking starts when the system/body center of mass slows down towards the lowest point at the end of the athlete’s unweighting phase. It is defined as when the system/body center-of-mass velocity is still negative but is ascending toward 0 m/s. Indicated in % of total time from the initiation of movement to the instant of take-off.
RP-0152Propulsive Phase%The propulsive phase starts when the system/body center of mass has fully stopped moving downward and the athlete starts propelling upward to jump. It is defined by positive velocity until the instant of take-off. Indicated in % of total time from the initiation of movement to the instant of take-off.
RP-0165Ground Reaction ForceNVertical ground reaction force from the initiation of movement to 1 second after landing.
RP-0148Relative Peak Braking ForceBWThe instantaneous peak vertical ground reaction force between the braking phase initiation and the end of the braking phase, represented as multiple of system/body weight.
RP-0149Peak Braking Force L/R Difference%Difference between the left and the right peak braking force, indicated in % difference. The % difference is calculated as (FR-FL/FL)*100% and relates to the difference compared to the left side. If the left force is higher, values are negative. If the right force is higher, values are positive.
RP-0157Relative Peak Propulsive ForceBWThe instantaneous peak vertical ground reaction force between the loading phase initiation and endto the instant of take-off, represented as multiple of system/body weight.
RP-0127Peak Propulsive Force L/R Difference%Difference between the left and the right peak propulsive force, indicated in % difference. The % difference is calculated as (FR-FL/FL)*100% and relates to the difference compared to the left side. If the left force is higher, values are negative. If the right force is higher, values are positive.
RP-0153Relative Net ImpulseBW*sTotal vertical impulse above bodyweight applied to the system/body centre of mass during the braking phase and the propulsion phase, represented as multiple of system/body weight.
RP-0154Relative Net Braking ImpulseBW*sTotal vertical impulse above bodyweight applied to the system/body centre of mass during the braking phase, represented as multiple of system/body weight.
RP-0155Relative Net Propulsion ImpulseBW*sTotal vertical impulse above bodyweight applied to the system/body centre of mass during the propulsion phase, represented as multiple of system/body weight.
RP-0160Pressure Distribution Braking PhaseN/cm²Mean pressure distribution during braking phase.
RP-0161Pressure Distribution Propulsive PhaseN/cm²Mean pressure distribution during propulsive phase.
RP-0164Braking/Propulsion COPMean center of pressure (COP) points of the braking and the propulsive phase.
RP-0162Longitudinal Braking COP/1Mean center of pressure (COP) of the braking phase in anterior/posterior direction, normalized by sensor insole length [0,1]. Balanced position is 0.5. Heel starts with 0, forefoot ends with 1.
RP-0163Longitudinal Propulsion COP/1Mean center of pressure (COP) of the propulsive phase in anterior/posterior direction, normalized by sensor insole length [0,1]. Balanced position is 0.5. Heel starts with 0, forefoot ends with 1.
RP-0087Test Criteria PassedIndicates if test criteria is met. “Yes” means all test criteria is met.
RP-0135Valid JumpsNumber of valid jumps. At least 1 valid jump that meets all test criteria is required to pass the test.
RP-0066CommentContains free comments for a particular test or test report.
Applicable Type
Sport
Trauma
Neuro
Arthroplasty
Contraindication

Pain in lower limbs

Swelling or increased surface temperature on injured structure

Test Procedure

1

Prepare
  • Stand upright on both feet
  • Feet are shoulder width apart
  • Put your hands on the hips
rego-drop-jump-step-2

2

Start

Jump on START

3

Squat
  • Squat to a self-selected depth
  • Knees flexed, hips back, and back straight
  • Keep your hands on the hips

4

Jump
  • Propel upward into the air
  • Jump as high as possible
  • Keep your hands on the hips

5

Land
  • Land back on the ground with both feet
  • Stick the landing without rebound
  • Keep your hands on the hips

6

Hold

Hold standing position

7

Repeats

Repeat procedure 2 more times to perform 3 jumps in total

8

Completion
  • Keep standing after the last repeat
  • The test is completed on TEST COMPLETED
rego-drop-jump-step-10

9

Additional
  • Enter coach reported test criteria
  • Enter self reported test criteria
  • Enter your fatigue and pain level
  • Enter free comments, if applicable

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