Table I:

Category descriptions for practice contact characteristics

Drill Intensity	Description
1	Athlete contacts a soft contact surface (i.e., bag)
2	Athlete is assigned a slower speed and cannot tackle
3	Athlete is assigned a slower speed and can tackle in a controlled manner
4	Athlete is assigned a competition speed and cannot tackle
5	Athlete can move through the drill as if in a competition
Drill Classification	Description
Minimal or No Player Contact	Athlete has minimal or no contact with equipment or another athlete (i.e., Dummy or Sled, Individual, 1-on-1 Pass)
Single Player vs Player Contact	Athlete engages in contact with one other athlete (i.e., Angle Tackle, 1-on-1 Block, 1-on-1 Tackle, 1-on-1 Pass, Open Field Tackle)
Multiple Player vs Player Contact	Athletes engage in contact with multiple other athletes (i.e., Oklahoma, Team Scrimmage, Inside Run, Skelly)
Drill Type	Description
1-on-1 Block	1-vs-1 blocking where 1 player blocks an opposing player
1-on-1 Pass	Players compete to catch a pass
1-on-1 Tackle	1-vs-1 tackling with 2 players starting <3 yds apart and tackle
Angle Tackle	1-vs-1 tackling 2 players starting >3 yds apart at an angle
Dummy or Sled	Player tackles or blocks a dummy or sled
Individual	Players participate in a variety of position-specific drills
Inside Run	Live scrimmage without skill players (i.e., wide receivers, cornerbacks)
Oklahoma	2-vs-2 tackling with tackler, blockers, and ball carrier in confined space
Open Field Tackle	1-vs-1 tackling with 2 players starting >3 yds apart and tackle head on
Skelly	Live scrimmage without linemen
Team Scrimmage	Live scrimmage