Demographic information and subconcussive head impact burden for study participantsa
| Primary Position | Age (yr) | Football Experience (yr) | No. of Prior Concussions | No. of Impacts >10 g | Cumulative Sum of Peak Linear Accelerations (g) | Cumulative Sum of Peak Rotational Accelerations (g) |
|---|---|---|---|---|---|---|
| OL | 15 | 5 | 0 | 894 | 24,564.4 | 1,810,771.7 |
| DL | 15 | 4 | 0 | 875 | 31,184.3 | 2,153,609.4 |
| RB | 15 | 10 | 0 | 860 | 28,593.6 | 1,822,181.9 |
| OL | 16 | 11 | 0 | 746 | 19,564.8 | 1,239,304.9 |
| LBa | 16a | 10a | 3a | 642a | 18,424.9a | 1,281,591.5a |
| LB | 17 | 6 | 0 | 549 | 15,968.8 | 1,119,530.6 |
| TE | 16 | 11 | 3 | 533 | 15,452.3 | 1,030,314.1 |
| WR | 16 | 6 | 0 | 387 | 13,497.6 | 903,651 |
| DB | 16 | 7 | 3 | 323 | 8164.3 | 595,068.9 |
| DB | 17 | 12 | 1 | 283 | 8190.2 | 592,990.3 |
| DB | 17 | 4 | 0 | 209 | 5733.8 | 354,013.8 |
| WR | 16 | 7 | 0 | 207 | 5017.5 | 365,631.7 |
| QB | 17 | 7 | 0 | 171 | 4962.7 | 278,609.3 |
| QB | 16 | 11 | 0 | 155 | 5634.1 | 368,306.5 |
| WR | 16 | 6 | 0 | 99 | 2589 | 147,352.9 |
| WR | 15 | 9 | 3 | 78 | 1845.5 | 130,116.5 |
| QB | 17 | 7 | 3 | 20 | 363.6 | 25,190.1 |
Note:—OL indicates offensive lineman; DL, defensive lineman; RB, running back; LB, linebacker; TE, tight end; WR, wide receiver; DB, defensive back; QB, quarterback.
↵a Concussed subject.