My undergraduate dissertation abstract: Assessing athlete readiness using jump monitoring is ineffective following repeated sprint exercise

Assessing athlete readiness using jump monitoring is ineffective following repeated sprint exercise.


The aim of the present study was to investigate the comparative sensitivity of the drop jump (DJ) and the countermovement jump (CMJ) when used as tools to detect neuromuscular fatigue following a repeated sprint protocol. Seven trained male participants (age 20.6 ± 1.5 years; height 176 ± 7 cm; body mass 84.6 ± 14.8 kg) volunteered for this study. Dependent variables of flight time, jump height, peak power, vertical velocity at take off, contact time, RSI and stiffness were measured using a force plate. Following baseline jump testing participants performed 15 x 30m sprints with an enforced 10m deceleration; a 60 second walk-back recovery was allowed between sprints. All dependent variables were re-measured on the force plate immediately after the sprints, then again at 24 hours, 48 hours and 72 hours to quantify the effects of fatigue. A one-way ANOVA with repeated measures determined that there were no significant differences (p > 0.05) or meaningful changes in any of the CMJ or DJ force variables measured over the 72 hour testing period. This investigation has shown that assessments of athlete readiness using the DJ and CMJ do not display adequate sensitivity in detecting fatigue following a repeated sprint protocol.

Key words: countermovement jump, drop jump, neuromuscular fatigue, sprinting, sensitivity.


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About scotthobbsstrength

Scott Hobbs - Strength and Conditioning Coach Scott graduated from St Marys University, London (UK) in 2014 with a B.Sc (Hons.) in Strength and Conditioning Science (First Class) and has almost completed his post graduate studies (PGDip) in Sports Rehabilitation. He is a Registered Strength and Conditioning Coach (RSCC) and Certified Strength and Conditioning Specialist (CSCS) through the National Strength and Conditioning Association, a Level 1 British Weightlifting Coach, a Level 1 USA Track and Field Coach, and a certified personal trainer. With over seven years experience in the strength and conditioning field (and more than ten in the fitness/health industry), Scott has worked with amateur/club level to elite national and international athletes in sports including rowing, football, rugby, powerlifting, sprint hurdling, weightlifting, lacrosse, and tennis (amongst others). Scott currently works as the associate strength and conditioning coach at the United States Military Academy (West Point) where he works with Army Football, Men's Rugby, Men's and Women's Tennis, and Women's Basketball. He also runs the analytics program for football and basketball, which includes GPS and readiness monitoring. Prior to West Point, he gained experience in D1 athletics at the University of Pennsylvania and Lehigh University. Before leaving the U.K. he was graduate assistant lecturer at St Mary's University where he taught undergraduate students on the Strength and Conditioning Science degree program. Other previous experience includes work with athletes at DeSales University, London Irish Professional Rugby Club, St Mary's University, and London Rowing Club. In his spare time, Scott actively competes in strength-based sports, having won a national competition in the UK and won two state meets (setting a state record in New York) in powerlifting. He also enjoys outdoor and combat-based sports. Scott currently lives with his wife, Anna, and son, Leo, in Highland Falls, NY (USA).

2 responses to “My undergraduate dissertation abstract: Assessing athlete readiness using jump monitoring is ineffective following repeated sprint exercise”

  1. Josh Fletcher says :

    Hi Scott,
    Hope this finds you well.
    I am just about to begin my masters thesis at St. Mary’s and I stumbled across this site and your abstract. I am keen to look at the correlations between drop jump, CMJ and athlete wellness monitoring in professional rugby union players. I think there are some similarities to some of the work you have done so it would be great to chat/share some info.

    Thanks for your time and I hope to hear from you soon.
    Kind regards

    • scotthobbsstrength says :

      Hi Josh,

      Apologies for the late response I didn’t see your comment. Absolutely happy to chat/share info. Will you be around St Mary’s anytime soon? Pop into my office (R45) and we can talk.



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