title: A comparison of scholastic and collegiate longsnapping techniques.
abstract: The purpose of this study was to identify the differences that exist between collegiate (CS) and scholastic (SS) longsnappers. Six CS (21.4 +/- 1.37 years) and 7 SS (16.7 +/- 1.11 years) longsnappers were filmed performing 10 longsnaps each. The CS and SS longsnappers had 7.0 +/- 0.89 and 2.7 +/- 0.95 years experience longsnapping, respectively. Each of the 10 longsnaps for all subjects were analyzed for takeoff velocity and accuracy. The snap that most closely approximated the individual snapper's median values for takeoff velocity and accuracy was digitized using a 20-point model. CS were both faster (0.85 +/- 0.10 seconds vs. 1.25 +/- 0.19 seconds) and more accurate in terms of mean radial error (29.36 +/- 8.4 cm vs. 47.2 +/- 8.26 cm) than their SS counterparts. These differences were related to body positioning both before and during the longsnap. CS exhibited more shoulder flexion (135 +/- 6.33 degrees ; vs. 98 +/- 9.01 degrees ) and greater elbow extension (133 +/- 8.1 degrees vs. 95 +/- 6.77 degrees ) in the set position phase, along with greater center of mass movement (0.27 +/- 0.02 m vs. 0.14 +/- 0.04 m) in the anterior-posterior direction and less hip flexion (72 +/- 1.85 degrees vs. 49 +/- 9.42 degrees ) during the preflight phase. Longsnapping experience and accuracy were significantly related (r = -0.82, p < 0.05). These results suggest that body positioning both before and during the longsnap motion significantly influence the velocity and accuracy of the longsnap.
authors.affiliation: Department of Exercise Science and Sport Studies, Springfield College, Springfield, Massachusetts 01108, USA. mblegen@spfldcol.edu
authors.forename: Mark
authors.initials: M
authors.lastname: Blegen
authors.forename: W Sean
authors.initials: WS
authors.lastname: Goldsworthy
authors.forename: Dean A
authors.initials: DA
authors.lastname: Stulz
authors.forename: Tyler
authors.initials: T
authors.lastname: Gibson
authors.forename: Glenn M
authors.initials: GM
authors.lastname: Street
authors.forename: Dave W
authors.initials: DW
authors.lastname: Bacharach
mesh_terms: D000293:Adolescent; D000328:Adult; D001696:Biomechanical Phenomena; D004551:Elbow Joint / Q000502:physiology; D005538:Football / Q000502:physiology*; D006621:Hip Joint / Q000502:physiology; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D012785:Shoulder Joint / Q000502:physiology; D014495:Universities; D014741:Video Recording