Changes in agonist neural drive, hypertrophy and pre-training strength all contribute to the individual strength gains after resistance training.

BALSHAW, Thomas G, MASSEY, Garry J, MADEN-WILKINSON, Tom, MORALES-ARTACHO, Antonio J, MCKEOWN, Alexandra, APPLEBY, Clare L and FOLLAND, Jonathan P (2017). Changes in agonist neural drive, hypertrophy and pre-training strength all contribute to the individual strength gains after resistance training. European Journal of Applied Physiology, 117, 631-640.

[img]
Preview
PDF
maden-wilkinson changes in agonist.pdf - Published Version
Available under License Creative Commons Attribution.

Download (779kB) | Preview
Link to published version:: 10.1007/s00421-017-3560-x

Abstract

PURPOSE: Whilst neural and morphological adaptations following resistance training (RT) have been investigated extensively at a group level, relatively little is known about the contribution of specific physiological mechanisms, or pre-training strength, to the individual changes in strength following training. This study investigated the contribution of multiple underpinning neural [agonist EMG (QEMGMVT), antagonist EMG (HEMGANTAG)] and morphological variables [total quadriceps volume (QUADSVOL), and muscle fascicle pennation angle (QUADSθ p)], as well as pre-training strength, to the individual changes in strength after 12 weeks of knee extensor RT. METHODS: Twenty-eight healthy young men completed 12 weeks of isometric knee extensor RT (3/week). Isometric maximum voluntary torque (MVT) was assessed pre- and post-RT, as were simultaneous neural drive to the agonist (QEMGMVT) and antagonist (HEMGANTAG). In addition QUADSVOL was determined with MRI and QUADSθ p with B-mode ultrasound. RESULTS: Percentage changes (∆) in MVT were correlated to ∆QEMGMVT (r = 0.576, P = 0.001), ∆QUADSVOL (r = 0.461, P = 0.014), and pre-training MVT (r = -0.429, P = 0.023), but not ∆HEMGANTAG (r = 0.298, P = 0.123) or ∆QUADSθ p (r = -0.207, P = 0.291). Multiple regression analysis revealed 59.9% of the total variance in ∆MVT after RT to be explained by ∆QEMGMVT (30.6%), ∆QUADSVOL (18.7%), and pre-training MVT (10.6%). CONCLUSIONS: Changes in agonist neural drive, quadriceps muscle volume and pre-training strength combined to explain the majority of the variance in strength changes after knee extensor RT (~60%) and adaptations in agonist neural drive were the most important single predictor during this short-term intervention.

Item Type: Article
Subjects: ?? Between-individual variability ??
?? Muscle architecture ??
?? Muscle volume ??
?? Neural drive ??
?? Strength training ??
Departments: Health and Well-being > Sport
Identification Number: 10.1007/s00421-017-3560-x
SWORD Depositor: Helen Garner
Depositing User: Helen Garner
Date Deposited: 25 Apr 2017 15:11
Last Modified: 14 Jun 2017 16:47
URI: http://shura.shu.ac.uk/id/eprint/15390

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics