Table IV:

Frequency of HAEs and total time spent over the season by drill type

Drill Type*	No. of Events [% Direct, % Indirect]	Event Rate Mean	Event Rate 95% CI	Total Drill Time (min)	Total No. of Events >25g
(a) 1-on-1 Block i	327 [30.0, 70.0]	0.18	0.15–0.22	422	7
(b) 1-on-1 Tackle i	187 [46.0, 54.0]	0.17	0.13–0.21	165	18
(c) Angle Tackle i	186 [36.6, 63.4]	0.16	0.12–0.20	150	16
(d) Dummy or Sled i	51 [33.3, 66.7]	0.18	0.12–0.26	197	1
(e) Individual g	83 [32.5, 67.5]	0.11	0.08–0.15	479	1
(f) Inside Run i	199 [39.2, 60.8]	0.17	0.13–0.23	216	1
(g) Oklahoma i,e	234 [41.5, 58.5]	0.25	0.19–0.30	135	36
(h) Open Field Tackle i	345 [40.9, 59.1]	0.16	0.16–0.23	230	40
(i) Team Scrimmage a,c,d,f,g,h	1570 [32.5, 67.5]	0.09	0.08–0.10	2022	66

^*a-i Drills that share the same superscript letter have mean number of events per player per minute per drill that differ at p < 0.05.