title: The effect of ball carrying method on sprint speed in rugby union football players.
abstract: Different methods of ball carrying can be used when a player runs with the ball in rugby union. We examined how three methods of ball carrying influenced sprinting speed: using both hands, under the left arm and under the right arm. These methods were compared with running without the ball. Our aim was to determine which method of ball carrying optimizes sprinting speed. Altogether, 48 rugby union players (age 21 +/- 2 years, height 1.83 +/- 0.1 m, body mass 85.3 +/- 12 kg, body fat 14 +/- 5%; mean +/- s) were recruited. The players performed twelve 30-m sprints in total (each player performed three trials under each of three methods of carrying the ball and sprinting without the ball). The design of the study was a form of Latin rectangle, balanced across the trial order for each of the methods and for pairwise combinations of the methods in blocks of four per trial. Each sprint consisted of a 10-m rolling start, followed by a 20-m timed section using electronic timing gates. Compared with sprinting 20 m without the ball (2.58 +/- 0.16 s), using both hands (2.62 +/- 0.16 s) led to a significantly slower time (P < 0.05). Sprinting 20 m with the ball under the left arm (2.61 +/- 0.15 s) or under the right arm (2.60 +/- 0.17 s) was significantly quicker than when using 'both hands' (P < 0.05), and both these methods were significantly slower than when running without the ball (P < 0.05). Accordingly, running with the ball in both hands led to the greatest decrement in sprinting performance, although carrying the ball under one arm also reduced the players' sprinting ability. Our results indicate that to gain a speed advantage players should carry the ball under one arm.
authors.affiliation: Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow, UK. s.grant@bio.gla.ac.uk
authors.forename: S J
authors.initials: SJ
authors.lastname: Grant
authors.forename: G
authors.initials: G
authors.lastname: Oommen
authors.forename: G
authors.initials: G
authors.lastname: McColl
authors.forename: J
authors.initials: J
authors.lastname: Taylor
authors.forename: L
authors.initials: L
authors.lastname: Watkins
authors.forename: N
authors.initials: N
authors.lastname: Friel
authors.forename: I
authors.initials: I
authors.lastname: Watt
authors.forename: D
authors.initials: D
authors.lastname: McLean
mesh_terms: D000054:Acceleration; D000328:Adult; D005538:Football / Q000502:physiology*; D006801:Humans; D008297:Male; D012420:Running / Q000502:physiology*; D019876:Sports Equipment; D013647:Task Performance and Analysis