Cory M Smith1, Terry J Housh2, Ethan C Hill3, Joshua L Keller2, John Paul V Anders2, Glen O Johnson2, Richard J Schmidt2. 1. Department of Kinesiology, Human and Environmental Physiology Laboratory, University of Texas at El Paso, College of Health Sciences , El Paso , TX , USA. 2. Department of Nutrition and Health Sciences, Human Performance Laboratory, University of Nebraska-Lincoln, College of Education and Human Sciences , Lincoln , NE , USA. 3. School of Kinesiology and Physical Therapy, Division of Kinesiology, University of Central Florida , Orlando , FL , USA.
Abstract
Purpose: The purpose of this study was to examine the changes in reflex-electromechanical delay (EMD) as a result of 2- and 4-wks of variable resistance training (VRT) or dynamic constant external resistance (DCER) leg press training. Material and Methods:Thirty-six men were randomised into either the Control, DCER, or VRT groups. The DCER and VRT groups performed 3 sets of 10 leg press repetitions 3-d·wk-1 for 4-wks. Reflex-EMD was measured at Baseline, Week-2, and Week-4. Results: The reflex-EMD durations decreased from Baseline at Week-2 and Week-4 for the VRT group, but not the DCER or Control groups. The reflex response < electrochemical process < mechanical process < total reflex-EMD for all groups. Conclusions: VRT elicited greater reflex adaptations compared to DCER training which indicated that VRT may be beneficial to incorporate into training or physical therapy programmes for pilots, soldiers, elderly, athletes, or professions that require quick reflexes and response times.
RCT Entities:
Purpose: The purpose of this study was to examine the changes in reflex-electromechanical delay (EMD) as a result of 2- and 4-wks of variable resistance training (VRT) or dynamic constant external resistance (DCER) leg press training. Material and Methods: Thirty-six men were randomised into either the Control, DCER, or VRT groups. The DCER and VRT groups performed 3 sets of 10 leg press repetitions 3-d·wk-1 for 4-wks. Reflex-EMD was measured at Baseline, Week-2, and Week-4. Results: The reflex-EMD durations decreased from Baseline at Week-2 and Week-4 for the VRT group, but not the DCER or Control groups. The reflex response < electrochemical process < mechanical process < total reflex-EMD for all groups. Conclusions: VRT elicited greater reflex adaptations compared to DCER training which indicated that VRT may be beneficial to incorporate into training or physical therapy programmes for pilots, soldiers, elderly, athletes, or professions that require quick reflexes and response times.
Entities:
Keywords:
EMD; Reflex response; electromechanical delay; neural plasticity; resistance training
Authors: Cory M Smith; Terry J Housh; John Paul V Anders; Joshua L Keller; Ethan C Hill; Glen O Johnson; Richard J Schmidt Journal: Eur J Appl Physiol Date: 2021-08-25 Impact factor: 3.078
Authors: Yiguan Lin; Yangyang Xu; Feng Hong; Junbo Li; Weibing Ye; Mallikarjuna Korivi Journal: Int J Environ Res Public Health Date: 2022-07-13 Impact factor: 4.614