Validity and reliability of hand and electronic timing for 40-yd sprint in college football players

Journal of Strength and Conditioning Research
J Bryan MannJ L Mayhew

Abstract

The 40-yd sprint is the premier event for evaluating sprint speed among football players at all competitive levels. Some questions remain concerning the validity of hand timing compared with electronic timing, as well as the lack of assessment and reliability of each method. The purpose of this study was to evaluate the validity of hand timing by experienced and novice timers compared with electronic timing and to establish the reliability and smallest worthwhile difference (SWD) of each method for the 40-yd sprint. National Collegiate Athletic Association (NCAA) Division I college football players (n = 81) ran two 40-yd sprint trials, with each being timed electronically (touch pad start and infrared beam stop) and with hand-held stopwatches by 2 experienced and 4 novice timers. There was no significant difference between trials timed electronically or by experienced and novice timers. Hand timing (experienced = 4.90 ± 0.34 seconds; novice = 4.86 ± 0.33 seconds) produced a significantly faster 40-yd sprint time than electronic timing (5.12 ± 0.35 seconds) by 0.22 ± 0.07 and 0.26 ± 0.08 seconds, respectively. Relative reliability was extremely high for all comparisons with intraclass correlation coefficient >0.987. The SWD was ...Continue Reading

References

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Citations

Oct 25, 2016·Journal of Strength and Conditioning Research·Joshua C BrickerArya Alami
Jul 12, 2016·Journal of Strength and Conditioning Research·Colin W BondBenjamin C Noonan
Jun 2, 2018·Journal of the International Society of Sports Nutrition·Mirjam LimmerPetra Platen
Sep 1, 2017·Journal of Strength and Conditioning Research·Colin W BondBenjamin C Noonan
Dec 2, 2018·Frontiers in Physiology·Pantelis Theodoros NikolaidisBeat Knechtle
Feb 1, 2019·International Journal of Environmental Research and Public Health·Robert G LockieRobin M Orr
Aug 18, 2021·Physical Therapy in Sport : Official Journal of the Association of Chartered Physiotherapists in Sports Medicine·Richard CahaninKyle Looney

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