Table 1. Description of selected tracking and non-tracking (performance) factors.
TRACKING FACTORS (http://stats.com/)
Acronym or name Description
Physiological variables
Physiological Load (Phy_Load) Every 0.25 second throughout the course of a game the product of a player’s mass, velocity and distance.Phy_Load = mass*average velocity*distance
Physiological Intensity (Phy_Int) Physiological load, divided by every minute he plays.Phy_Int = Phy_Load /minutes played
Speed and distance variables
Defensive average speed (Def_Average_Speed) Average Speed Run on Defense (ml/h)
Offensive average speed (Off_Average_Speed) Average Speed Run on Offense (ml/h)
Distance Total distance run (ml)
Mechanical Load variables
Mechanical Load (Mech_Load) Measures the change of speed by a player throughout the course of the game. These are identified as accelerations and decelerations, derived from the changing of speeds throughout the locomotor activities (walk, jog, run, sprint, max). Each level includes a weighting factor to account for the severity of the acceleration and deceleration
Mechanical Intensity (Mech_Int) Mechanical Load/minutes played
Acceleration (acc) Increase in intensity that is maintained for at least one second
Level one acceleration (Acc_1) 0.5 m/s2 acceleration
Level two acceleration (Acc_2) 1 m/s2 acceleration
Level three acceleration (Acc_3) 2 m/s2 acceleration
Level four acceleration (Acc_4) 4 m/s2 acceleration
Deceleration (Dec) Decrease in intensity level that is maintained for at least one second
Level one deceleration (Dec_1) 0.5 m/s2 deceleration
Level two deceleration (Dec_2) 1 m/s2 deceleration
Level three deceleration (Dec_3) 2 m/s2 deceleration
Level four deceleration (Dec_4) 4 m/s2 deceleration
Locomotor variables
Walk maximal speed (WALK_MAX) player individually achieved 0-20% of maximal speed
Run maximal speed (RUN_MAX) player individually achieved 40-60% of maximal speed
Sprint maximal speed (SPRINT_MAX) player individually achieved 60-80% of maximal speed
Maximal speed (MAX_MAX) player individually achieved >80% of maximal speed
NON-TRACKING FACTORS (www.basketball-reference.com)
Acronym or name Description
Performance variables
Player efficiency rating (PER) Rating of a player's per-minute productivity (1 / MP) *[ 3P + (2/3) * AST + (2 - factor * (team_AST / team_FG)) * FG + (FT *0.5 * (1 + (1 - (team_AST / team_FG)) + (2/3) * (team_AST / team_FG)))- VOP * TOV- VOP * DRB% * (FGA - FG)- VOP * 0.44 * (0.44 + (0.56 * DRB%)) * (FTA - FT)+ VOP * (1 - DRB%) * (TRB - ORB)+ VOP * DRB% * ORB + VOP * STL + VOP * DRB% * BLK - PF * ((lg_FT / lg_PF) - 0.44 * (lg_FTA / lg_PF) * VOP) ]
Usage percentage (Usg%) An estimate of the percentage of team plays used by a player while he was on the floor: 100 * ((FGA + 0.44 * FTA + TOV) * (Tm MP / 5)) / (MP * (Tm FGA + 0.44 * Tm FTA + Tm TOV))
tm: team; lg: league; min: minutes played; AST: number of assists; 3P: number of three-point field goals made; FG: number of field goals made; FGA: number of field goals attempted; FT number of free throws made; FTA: number of free throws attempted; VOP: value of possession in reference to the league; TOV: number of turnovers; RB: number of rebounds; ORB: number of offensive rebounds; DRB: number of defensive rebounds; TRB: number of total rebounds; RBP, percentage of offensive or defensive; 1g: team pace value; MP: minute played