TABLE 2.
Number of Impacts Overall and per Individual Event in Youth Football Players by Group, 2014 Seasona
| Type of Event | Group | No. of Impacts | No. of Impacts per Individual Event | ||
|---|---|---|---|---|---|
| Mean ± SD | Difference (95% CI)b | Median | |||
| 10g cutoff | |||||
| Practice | NHUF | 2933 | 8.9 ± 3.1 | 0.0 | 9.0 |
| HUF | 1317 | 5.6 ± 2.9 | 3.4 (2.9 to 3.9)c | 6.0 | |
| Overall | 4250 | 7.5 ± 3.4 | 7.5 | ||
| Games | NHUF | 1704 | 12.7 ± 4.0 | 0.0 | 13.0 |
| HUF | 1524 | 13.1 ± 3.7 | –0.4 (–1.4 to 0.5) | 13.0 | |
| Overall | 3228 | 12.9 ± 3.9 | 13.0 | ||
| 20g cutoff | |||||
| Practice | NHUF | 1235 | 3.9 ± 1.9 | 0.0 | 4.0 |
| HUF | 580 | 2.9 ± 1.4 | 1.0 (0.7 to 1.3)c | 3.0 | |
| Overall | 1815 | 3.5 ± 1.8 | 3.0 | ||
| Games | NHUF | 741 | 5.6 ± 2.5 | 0.0 | 5.0 |
| HUF | 671 | 5.8 ± 2.4 | –0.2 (–0.9 to 0.4) | 5.0 | |
| Overall | 1412 | 5.7 ± 2.5 | 5.0 | ||
aHUF, Heads Up Football; NHUF, non–Heads Up Football.
bDifference of the mean number of impacts per individual event between NHUF and HUF; 95% CI obtained from independent-samples t test.
cStatistically significant difference.