Richard C Blagrove1, Kristina M Holding2, Stephen D Patterson2, Glyn Howatson3, Philip R Hayes4. 1. Department of Sport and Exercise Science, Faculty of Health, Education and Life Sciences, School of Health Sciences, Birmingham City University, City South Campus, United Kingdom; Department of Sport, Exercise and Rehabilitation, Northumbria University, United Kingdom. Electronic address: richard.blagrove@bcu.ac.uk. 2. Department of Sport and Exercise, School of Sport, Health and Applied Science, St Mary's University, United Kingdom. 3. Department of Sport, Exercise and Rehabilitation, Northumbria University, United Kingdom; Water Research Group, Northwest University, South Africa. 4. Department of Sport, Exercise and Rehabilitation, Northumbria University, United Kingdom.
Abstract
OBJECTIVES: To determine the effect of performing depth jumps (DJ) pre-exercise on running economy (RE) and time to exhaustion (TTE) at the speed associated with maximal oxygen uptake (sV˙O2max) in a group of high-performing junior middle-distance runners. DESIGN: Randomized crossover study. METHODS:Seventeen national- and international-standard male distance runners (17.6±1.2years, 63.4±6.3kg, 1.76±0.06m, 70.7±5.2mLkg-1min-1) completed two trials. Following a 5min warm-up at 60% V˙O2max, participants performed a 5min run at 20%Δ below oxygen uptake corresponding with lactate turn-point to determine pre-intervention RE. Participants then completed either six DJ from a box equivalent to their best counter-movement jump (CMJ) or a control condition (C) involving body weight quarter squats. After a 10min passive recovery, another 5min sub-maximal run was performed followed by a run to exhaustion at sV˙O2max. RESULTS: Compared to the C trial, DJ produced moderate improvements (-3.7%, 95% confidence interval for effect size: 0.25-1.09) in RE, which within the context of minimal detectable change is considered possibly beneficial. Differences in TTE and other physiological variables were most likely trivial (ES: <0.2). Individual responses were small, however a partial correlation revealed a moderate relationship (r=-0.55, p=0.028) between change in RE and CMJ height. CONCLUSIONS: The inclusion of a set of six DJ in the warm-up routine of a well-trained young male middle-distance runner is likely to provide a moderate improvement in RE.
RCT Entities:
OBJECTIVES: To determine the effect of performing depth jumps (DJ) pre-exercise on running economy (RE) and time to exhaustion (TTE) at the speed associated with maximal oxygen uptake (sV˙O2max) in a group of high-performing junior middle-distance runners. DESIGN: Randomized crossover study. METHODS: Seventeen national- and international-standard male distance runners (17.6±1.2years, 63.4±6.3kg, 1.76±0.06m, 70.7±5.2mLkg-1min-1) completed two trials. Following a 5min warm-up at 60% V˙O2max, participants performed a 5min run at 20%Δ below oxygen uptake corresponding with lactate turn-point to determine pre-intervention RE. Participants then completed either six DJ from a box equivalent to their best counter-movement jump (CMJ) or a control condition (C) involving body weight quarter squats. After a 10min passive recovery, another 5min sub-maximal run was performed followed by a run to exhaustion at sV˙O2max. RESULTS: Compared to the C trial, DJ produced moderate improvements (-3.7%, 95% confidence interval for effect size: 0.25-1.09) in RE, which within the context of minimal detectable change is considered possibly beneficial. Differences in TTE and other physiological variables were most likely trivial (ES: <0.2). Individual responses were small, however a partial correlation revealed a moderate relationship (r=-0.55, p=0.028) between change in RE and CMJ height. CONCLUSIONS: The inclusion of a set of six DJ in the warm-up routine of a well-trained young male middle-distance runner is likely to provide a moderate improvement in RE.
Authors: Maria H Gil; Henrique P Neiva; Nuno D Garrido; Felipe J Aidar; Maria S Cirilo-Sousa; Mário C Marques; Daniel A Marinho Journal: Int J Environ Res Public Health Date: 2019-05-24 Impact factor: 3.390
Authors: Gustavo Ivo de Carvalho E Silva; Leandro Henrique Albuquerque Brandão; Devisson Dos Santos Silva; Micael Deivison de Jesus Alves; Felipe J Aidar; Matheus Santos de Sousa Fernandes; Ricardo Aurélio Carvalho Sampaio; Beat Knechtle; Raphael Fabricio de Souza Journal: Sports Med Open Date: 2022-08-17