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THE RELATIONSHIP BETWEEN VELOCITY OF DRIVE BLOCK AND SELECTED EXERCES IN DIVISION I COLLEGIATE FOOTBALL LINEMEN

Abstract

J. Bryan Mann1 , Bert H. Jacobson2 FACSM. 1 University of Missouri, Physical Therapy and Athletic Training, 2Oklahoma State University, Health & Human Performance,

The drive block is the basic of a running play and is typically executed by offensive linemen a three-point stance. The technique begins with a quick explosion into the defensive lineman followed by driving the legs in an attempt to displace the defender. Strength and power are vital to this skill and training of these variables is conducted during the offseason as well as during the season. PURPOSE: The purpose of this study was to investigate the relationship between velocity of the drive block and selected strength and power variables. METHODS: Following IRB approval 10 offensive linemen performed 10 fire-outs from a three-point stance into a stationary blocking dummy while assessments of power and velocity were made. Velocity (m/sec) was recorded using a Tendo® Power and Speed Analyzer and these data were correlated with each players’ 225lb Bench Press repetitions: 1-RM Bench Press, Squat, Hang Clean, and Vertical Jump. RESULTS: Means for each variable were: 225lb bench press 1-RM bench press 357.0 +38.02kg, 1 R-M Squat 520.25+111.56; 1 R-M Hang Clean 307.67 +50.03; Vertical Jump 66.74 +5.80 ; Average Velocity 1.76 +0.044 m/sec. Correlations of the variables yielded significant (p<0.05) positive associations between Average Velocity and 225lb Bench Press (r=0.92), Bench Press (r=0.89) and Hang Clean (r=0.81) but not for the Squat (r=0.60) or the Vertical Jump (r=0.10). CONCLUSION: Based on these results training protocols inclusive of the bench press and hang clean positively offensive line play. It may be that in current line block technique much of the initial hit is by the heel of the hands to the body of the defender. It is suggested that training continue to include the both the bench press and hang clean in year-long training in order to maximize playing efficiency.

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