Abstract
Collegiate field hockey in the United States underwent a game format change in 2019, moving from two halves to four quarters to align with international play. The purpose of this study is to report physical activity profiles for US Collegiate Division I female field hockey athletes in the game format of four quarters and compare activity pre- and post-rule change. Activity profiles of a US Collegiate Division I female field hockey team were recorded using a Polar Pro Sensor. Fifteen regular season games from 2018 were analyzed from 21 players, and fifteen regular season games from 2019 were analyzed from 20 players. Absolute and relative activity profile data, including total distance, maximum velocity, low-speed and high-speed running, and number of surges for the team and positional difference, were compared across the two seasons. While an increase in the number of substitutions as well as a decrease in match time was noted, overall, the change in format had minimal impact on player performance profiles, including total time played, distance traveled, and maximum velocity. The results suggest the change in format did not alter the physical activity profiles for midfielders or forwards but did change for defenders. Implications for performance that existed before the rule change can be seen as consistent going forward.
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