Ch. 7 Velocity in the Weight Room

Videography

Earliest method used to measure lifting velocity

Tendo Unit

Common tether-based velocity measurement device

Accelerometer

Device that measures movement in three axes

Markerless system

Newest motion-capture technology without markers

Force Plate

Device that measures ground reaction forces

Familiarization

Practice period before official testing begins

Peak Velocity

Highest velocity achieved during a repetition

Mean Velocity

Average velocity throughout a repetition

Sticking Point

Difficult portion of a lift where force production decreases

Second Pull

Portion of a clean where peak velocity often occurs

Last Repetition Effect

Extra effort commonly seen during the final repetitions

Speed Squat

Squat performed explosively without leaving the ground

Squat Jump

Squat variation where the athlete leaves the ground

VBT

System that uses lifting speed to guide training

Force-Velocity Curve

Relationship between force and movement speed

Regression Line

Statistical trend line used on velocity-load graphs

Rate Force Development (RFD)

Measure of how quickly force is produced

dF/dt

Formula used for rate of force development

Augmented Eccentric Loading

Resistance greater during the lowering phase than lifting phase

PAP

Heavy preload followed by explosive activity

Variable Resistance

Resistance provided by chains and bands

Isokinetic Resistance

Resistance that maintains a constant movement speed

APRE

Training system that adjusts to athlete readiness

Seated Shot Put

Test using a seated medicine-ball throw

Kansas Squat Test

Fatigue assessment using repeated speed squats

TUT

Time a muscle remains under load

Velocity-Load Curve

Velocity curve used to estimate strength levels

System Mass

Force measurement including athlete and barbell mass

Barbell Mass

Force measurement focused on barbell movement

Biofeedback

Immediate performance information provided during training

30

Typical frame rate of standard video analysis _____ FPS

1000

High-end laboratory sampling frequency may reach _____ Hz

deceleration

The final phase of many lifts involves barbell _____

propulsive

Starting phase responsible for accelerating the load ____________ phase.

faster

Taller athletes generally move the barbell _____

rehabilitation

Slow concentric lifting is most often used for _____

power

Static stretching before explosive activity may reduce _____

motion

Markerless systems are a type of _____ capture technology

15

The Kansas Squat Test uses _____ repetitions

1

Mean squat-test bar velocity is approximately _____ m/s.

fatigue

Velocity decreases beyond a threshold can indicate training _____