Performance & Kinetics

Data presented under performance and kinetics will cover jump heights, distances, forces, torques, and relevant ratios. This category is only on the lower body - performance tasks page (jumps) in the 2nd column.

Data Points:

• Jump Height: The difference between the height of the pelvis while standing and the peak height during the jump.
• GRF Takeoff: The maximum ground reaction force magnitude (N) produced from when the center of mass is at its lowest point to when the feet leave the ground.
• Net Impulse: Impulse (Ns) is the change in momentum and can be calculated by integrating force (N) over time. When jumping there will be a negative impulse and a positive impulse. The net impulse is the sum of these.
• Hip Torque: The maximum torque magnitude (Nm) produced at the hip joint as a percentage of the individual's mass (in Newtons). Joint Torques are calculated using the total ground reaction forces inverse dynamics and Dempster's body segment parameter data.
• Knee Torque: The maximum torque magnitude (Nm) produced at the knee joint as a percentage of the individual's mass (in Newtons). Joint Torques are calculated using the total ground reaction forces inverse dynamics and Dempster's body segment parameter data.
• Ankle Torque: The maximum torque magnitude (Nm) produced at the ankle joint as a percentage of the individual's mass (in Newtons). Joint Torques are calculated using the total ground reaction forces inverse dynamics and Dempster's body segment parameter data.
• Flight:Contact Ratio: The flight-to-contact ratio is a ratio of how much time the individual spent in the air versus how much time the individual spent on the ground.