| PURPOSE: To compare differences in distance traveled, maximum velocity, accelerations,;decelerations, and high intensity change of directions in Division I football players. METHODS:;Twenty-one Division I football players, ages 18-24, wore global positioning system (GPSs).;monitors during games to track selected variables of each athlete. Athletes were grouped by.;similarities in playing position in the following manner; wide receiver (WR) and defensive back.;(DB), and offensive linemen (OL) and defensive linemen (DL). Parameters measured were total.;distance covered, maximum velocity, total inertial movement analysis (IMA) (movements >3.5.;m/s2), distances traveled in deceleration and acceleration using two velocity categories for each.;(Deceleraton band 1=3-10m/s2 Deceleration band 2=2-3m/s2, Acceleration band 7=2-3m/s2, and.;Acceleration band 8=3-10m/s2). Inclusion criteria included that athletes must have participated in.;70% of the total plays during the games selected. A Oneway ANOVA analysis with 95%.;confidence interval for means was used to determine differences (p<.05) among groups. Newman.;Keuls post hoc tests were used to determine mean differences. RESULTS: The results of The.;present study indicated that DBs scored significantly (p<0.05) higher in total distance covered,;total IMA, deceleration and acceleration in both Band 1 and Band 2 than WRs. There was no.;significant difference between DBs and WRs in maximum velocity. DL scored significantly higher.;in maximum velocity, deceleration and acceleration Band 1 than OL. There were no significant.;differences between DL and OL in total distance covered, total IMA, and deceleration and.;acceleration Band 2. CONCLUSION: DBs and DL travel further, average higher maximum.;velocities, and accrue more high intensity, explosive movements throughout a game than WRs and.;OL.This study provides quantification of positional physical demands and comparisons of.;collegiate football games and could be used to develop position specific training programs to better.;prepare athletes for play. |
