RSI 10-5 - Timepoints
Start:
Definition: Initiation of the countermovement jump and start of the unloading phase. Calculation: GRFz < bodyweight (N) ± 5SD Units: Frame #
Braking End:
Definition: End of the braking phase and start of the concentric phase. Calculation: First frame where COM vertical velocity > 0, following yielding end. Units: Frame #
Takeoff:
Definition: End of the concentric phase and start of the flight phase. Calculation: First frame GRFz < 30N Units: Frame #
Ground Contact:
Definition: End of the flight phase and start of the landing phase. Calculation: First frame GRFz > 30N following takeoff Units: Frame #
RSI 10-5 - KPI
Bodyweight:
Definition: Average GRFz during weighting phase (i.e., when participant stands motionless on the force platform(s). Also referred to as system weight Calculation: mean(GRFz[0:500]) Units: Newtons (N)
Mass:
Definition: Mass of the participant (system) in kilograms determined during the weighting phase. Calculation: Bodyweight (N) / -9.81 m/s2 Units: Kilograms (kg)
Jump Height:
Definition: Measure of jumping performance. Center of mass displacement of the individual. Calculated based on impulse momentum. Average of 5 best jump heights. Calculation: Jump height = vtakeoff2(m/s) / 2*gravitational acceleration (m/s/s) Units: Meters (m), Inches (in)
MRSI:
Definition: Measure of explosive jumping performance. Ratio of Jump Height to Jump Time. Average of 5 jumps based on top 5 jump heights. Calculation: Jump Height/ Jump Time Units: Unitless
RSI:
Definition: Measure of explosive jumping performance. Ratio of Flight Time to Jump Time. Average of 5 jumps based on top 5 jump heights. Calculation: Flight Time/ Jump Time Units: Unitless
Net Impulse Ratio:
Definition: Ratio of braking net impulse to concentric net impulse. Average of 5 jumps based on top 5 jump heights. Calculation: Braking Impulse/ Concentric Impulse Units: Unitless
Concentric Net Impulse:
Definition: Impulse generated by the individual during the concentric phase independent of bodyweight. Average of 5 jumps based on top 5 jump heights. Calculation: ∫(Force (N) – Bodyweight(N)) * t(s) Units: Newton · seconds (N·s)
Braking Net Impulse:
Definition: Impulse generated by the individual during the braking phase independent of bodyweight. Average of 5 jumps based on top 5 jump heights. Calculation: ∫(Force (N) – Bodyweight(N)) * t(s) Units: Newton · seconds (N·s)
Momentum:
Definition: Vertical center of mass momentum of the individual at takeoff. Average of 5 jumps based on top 5 jump heights. Calculation: mass (kg) * velocitytakeoff (m/s) Units: Kilogram · meters per second (kg·m/s)
Jump Time:
Definition: Elapsed time between the start of the jump and takeoff . Average of 5 jumps based on top 5 jump heights. Calculation: Timetakeoff(s) – Timestart(s) Units: Seconds (s)
Flight Time:
Definition: Elapsed time between takeoff and ground contact following takeoff . Average of 5 jumps based on top 5 jump heights. Calculation: Timeground contact (s) – Timetakeoff(s) Units: Seconds (s)
COM Depth: Displacement of the individual’s center of mass from the starting position
Definition: Displacement of the individual’s center of mass from the starting position. Average of 5 jumps based on top 5 jump heights. Calculation: Positiontimepoint – Positionstart (m) Units: Meters (m)
RSI 10-5 - Sub phase Metrics
Phase Time:
Definition: Temporal duration of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: ∆phase time(s) Units: Seconds (s)
Avg Vel:
Definition: Average center of mass vertical velocity across selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean COMvelocity(m/s). Units: Meters per second (m/s)
Peak Vel:
Definition: Peak negative center of mass vertical velocity within the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: maximum COMvelocity (m/s). Units: Meters per second (m/s)
Avg Force:
Definition: Average vertical force production during the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean vertical GRFz (N) Units: Newtons (N)
Avg Force Rel:
Definition: Average vertical force production during the selected phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean vertical GRFz (N)/ body mass (kg) Units: Newtons per kilogram (N/kg)
Peak Force:
Definition: Peak vertical force production during the selected phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: maximum GRFz (N) during the selected phase Units: Newtons (N)
Peak Force Rel:
Definition: Peak vertical force production during the selected phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: maximum GRFz (N) during the selected phase / mass (kg) Units: Newtons per kilogram (N/kg)
Avg RFD:
Definition: Average rate of force development during the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean GRFz(N)/ Time (s) across the selected phase Units: Newtons per second (N/s)
Avg RFD Rel:
Definition: Average rate of force development during the selected phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean GRFz(N)/ Time (s) across the selected phase / mass(kg) Units: Newtons per second per kilogram (N/s/kg)
Peak RFD:
Definition: Peak rate of force development during the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: maximum GRFz(N)/ Time (s) across the selected phase Units: Newtons per second (N/s)
Peak RFD Rel:
Definition: Peak rate of force development during the selected phase normalized to body mass. Average of 5 jumps based on top 5 jump heights. Calculation: maximum GRFz(N)/ Time (s) across the selected phase divided by mass(kg) Units: Newtons per second per kilogram (N/s/kg)
Torso Angle:
Definition: Segment angle of the torso at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip Flexion Angle L:
Definition: Left hip joint flexion/ extension angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip Flexion Angle R:
Definition: Right hip flexion/ extension joint angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip Add Angle L:
Definition: Left hip joint adduction/abduction angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip Add Angle R:
Definition: Right hip joint adduction/abduction angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip IR Angle L:
Definition: Left hip joint internal/external rotation angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Hip IR Angle R:
Definition: Right hip joint internal/external rotation angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Knee Flexion Angle L:
Definition: Left knee joint flexion/ extension angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Knee Flexion Angle R:
Definition: Right knee joint flexion/ extension angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Ankle Flexion Angle L:
Definition: Left ankle joint flexion/ extension angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Ankle Flexion Angle R:
Definition: Right ankle joint flexion/ extension angle at the end of the selected phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
RSI 10-5 - Braking Metrics
Braking Time:
Definition: Temporal duration of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Braking End (s) – Yielding End (s) Units: Seconds (s)
Braking Avg Vel:
Definition: Average center of mass vertical velocity across the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean (com_velocity)[braking_end:yielding_end] Units: Meters per second (m/s)
Braking Peak Vel:
Definition: Peak negative center of mass vertical velocity within the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: min (com_velocity) [braking_end:yielding_end] Units: Meters per second (m/s)
Braking Avg Force:
Definition: Average vertical force production during the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N))[braking_end:yielding_end] Units: Newtons (N)
Braking Avg Force Rel:
Definition: Average vertical force production during the braking phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N))[braking_end:yielding_end] / mass (kg) Units: Newtons per kilogram (N/kg)
Braking Peak Force:
Definition: Peak vertical force production during the braking phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N))[braking_end:yielding_end] Units: Newtons (N)
Braking Peak Force Rel:
Definition: Peak vertical force production during the braking phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N))[braking_end:yielding_end] / mass (kg) Units: Newtons per kilogram (N/kg)
Braking Avg RFD:
Definition: Average rate of force development during the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N)[braking_end:yielding_end] / Braking Time (s) Units: Newtons per second (N/s)
Braking Avg RFD Rel:
Definition: Average rate of force development during the braking phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N)[braking_end:yielding_end] / Braking Time (s))/ mass (kg) Units: Newtons per second per kilogram (N/s/kg)
Braking Peak RFD:
Definition: Peak rate of force development during the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N)[braking_end:yielding_end] / BrakingTime (s) Units: Newtons per second (N/s)
Braking Peak RFD Rel:
Definition: Peak rate of force development during the braking phase normalized to body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N)[braking_end:yielding_end] / Braking Time (s) / mass(kg). Units: Newtons per second per kilogram (N/s/kg)
Braking Torso Angle:
Definition: Segment angle of the torso at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip Flexion Angle L:
Definition: Left hip joint flexion/ extension angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip Flexion Angle R:
Definition: Right hip flexion/ extension joint angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip Add Angle L:
Definition: Left hip joint adduction/abduction angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip Add Angle R:
Definition: Right hip joint adduction/abduction angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip IR Angle L:
Definition: Left hip joint internal/external rotation angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Hip IR Angle R:
Definition: Right hip joint internal/external rotation angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Knee Flexion Angle L:
Definition: Left knee joint flexion/ extension angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Knee Flexion Angle R:
Definition: Right knee joint flexion/ extension angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Ankle Flexion Angle L:
Definition: Left ankle joint flexion/ extension angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Braking Ankle Flexion Angle R:
Definition: Right ankle joint flexion/ extension angle at the end of the braking phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
RSI 10-5 - Concentric Metrics
Concentric Time:
Definition: Temporal duration of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Takeoff (s) – Braking End (s) Units: Seconds (s)
Concentric Avg Vel:
Definition: Average center of mass vertical velocity across the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean (com_velocity)[takeoff:braking_end] Units: Meters per second (m/s)
Concentric Peak Vel:
Definition: Peak negative center of mass vertical velocity within the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: max (com_velocity) [takeoff:braking_end] Units: Meters per second (m/s)
Concentric Avg Force:
Definition: Average vertical force production during the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N))[takeoff:braking_end] Units: Newtons (N)
Concentric Avg Force Rel:
Definition: Average vertical force production during the concentric phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N))[takeoff:braking_end] / mass (kg) Units: Newtons per kilogram (N/kg)
Concentric Peak Force:
Definition: Peak vertical force production during the concentric phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N))[takeoff:braking_end] Units: Newtons (N)
Concentric Peak Force Rel:
Definition: Peak vertical force production during the concentric phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N))[takeoff: braking_end] / mass (kg) Units: Newtons per kilogram (N/kg)
Concentric Avg RFD:
Definition: Average rate of force development during the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N)[takeoff:braking_end] / Concentric Time (s) Units: Newtons per second (N/s)
Concentric Avg RFD Rel:
Definition: Average rate of force development during the concentric phase normalized to participant’s body mass. Average of 5 jumps based on top 5 jump heights. Calculation: mean(Force(N)[takeoff: braking_end] / Concentric Time (s))/ mass (kg) Units: Newtons per second per kilogram (N/s/kg)
Concentric Peak RFD:
Definition: Peak rate of force development during the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N)[takeoff:braking_end] / Concentric Time (s) Units: Newtons per second (N/s)
Concentric Peak RFD Rel:
Definition: Peak rate of force development during the concentric phase normalized to body mass. Average of 5 jumps based on top 5 jump heights. Calculation: max(Force(N)[takeoff:braking_end] / Concentric Time (s) / mass(kg). Units: Newtons per second per kilogram (N/s/kg)
Concentric Torso Angle:
Definition: Segment angle of the torso at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Hip Flexion Angle L:
Definition: Left hip joint flexion/ extension angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Hip Flexion Angle R:
Definition: Right hip flexion/ extension joint angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Hip Add Angle L:
Definition: Left hip joint adduction/abduction angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Hip Add Angle R:
Definition: Right hip joint adduction/abduction angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Hip IR Angle L:
Definition: Left hip joint internal/external rotation angle at the end of the concentric phase. Calculation: Average of 5 jumps based on top 5 jump heights. Units: Degrees (°)
Concentric Hip IR Angle R:
Definition: Right hip joint internal/external rotation angle at the end of the concentric phase. Calculation: Average of 5 jumps based on top 5 jump heights. Units: Degrees (°)
Concentric Knee Flexion Angle L:
Definition: Left knee joint flexion/ extension angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Knee Flexion Angle R:
Definition: Right knee joint flexion/ extension angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Ankle Flexion Angle L:
Definition: Left ankle joint flexion/ extension angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)
Concentric Ankle Flexion Angle R:
Definition: Right ankle joint flexion/ extension angle at the end of the concentric phase. Average of 5 jumps based on top 5 jump heights. Calculation: Units: Degrees (°)