CONSECUTIVE COUNTERMOVEMENT JUMP (CCMJ)

A practical, valid, and reliable measure of lower-body power.

METRICS

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Air Time

The time from takeoff to landing of a jump.

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Impact

A means of quantifying the strategy used to absorb energy.

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Impact Asymmetry

A measure of the difference in Impact Accelerations between feet.

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Horizontal Impact

A means of quantifying the strategy used to absorb impact.

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Vertical Impact

A means of quantifying the strategy used to absorb impact.

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Intensity

The acceleration load experienced per minute of activity.

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Jump Count

The number of jumps that were recorded.

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Jump Height (Average)

Changes can be an indicator for neuromuscular fatigue.

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Jump Height (Maximum)

A commonly used performance measure as it reflects quad strength and power production.

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Load Asymmetry

The percent difference between accelerations exerted on the left and right feet.

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Push-off

A means for quantifying the strategy used to push off the ground.

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Push-off Asymmetry

A measure of the difference in Push-off Accelerations between feet.

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Horizontal Push-off

A means of quantifying the strategy used to push off the ground.

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Vertical Push-off

A means of quantifying the strategy used to push off the ground.

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Reactive Strength Index (RSI)

Measures reactive jump capacity by reflecting a person's ability to turn deceleration into acceleration in a short period of time.

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Signal

The resultant acceleration signal.

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Signal x-axis

The acceleration signal in the medial-lateral directions.

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Signal y-axis

The acceleration signal in the antero-posterior directions.

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Signal z-axis

The acceleration signal in the superior-inferior directions.

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Total Load

The cumulative acceleration load experienced over an activity.

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