University of Jyväskylä | JYX Digital Repository

  • English  | Give feedback |
    • suomi
    • English
 
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.
View Item 
  • JYX
  • Opinnäytteet
  • Pro gradu -tutkielmat
  • View Item
JYX > Opinnäytteet > Pro gradu -tutkielmat > View Item

Neural contribution to postactivation potentiation

Thumbnail
View/Open
2.0 Mb

Downloads:  
Show download detailsHide download details  
Authors
Ruggiero, Luca
Date
2015
Discipline
BiomekaniikkaBiomechanics

 
The current study was designed to investigate the contribution of neural factors to postactivation potentiation (PAP). Neuromuscular function (i.e. twitches, H-reflexes, motor evoked potentials, and voluntary isometric ballistic contractions) of 8 power-trained (POW) and 8 endurance-trained (END) athletes was recorded before and after a 8-second maximal isometric conditioning contraction (CC) to induce PAP, to elucidate discriminating neural factors in exploiting PAP that might arise from the former training background compared to the latter. After CC, twitch peak force and rate of force development were significantly increased, with higher potentiation in POW (29 ± 11% and 64 ± 24%) than END (8 ± 12% and 34 ± 20%). Among evoked potentials, only motor evoked potentials were short-term facilitated (127 ± 111% and 93 ± 89%, for END and POW respectively), similarly between groups. No differences were reported in ballistic performance (P ≥ 0.069), whose neural drive was significantly depressed in POW at 1 and 2 minutes post-CC, respectively compared to END and to baseline (19 ± 11%). PAP was characterized from enhanced muscle contractile characteristics as well as short-term facilitation of corticospinal excitability, whose individual contribution to performance enhancement could not be quantified. However, when POW were compared to END, the former group benefited from PAP in triceps surae muscles only in terms of higher potentiation of muscular contractile characteristics, as neural pathways were affected likewise from CC. In addition, neural drive of ballistic performance, if affected, might be depressed in POW rather than enhanced, presumably due to neural fatigue from CC. Differences between groups in exploiting PAP in ballistic actions might be therefore primarily related to muscular potentiating mechanisms, although only non-significant potentiation (p-value close to the significance threshold) was found in ballistic performance in our experiments. ...
Keywords
Postactivation potentiation supramaximal twitches corticospinal excitability ballistic performance neural drive. hermosto aivokuori suorituskyky
URI

http://urn.fi/URN:NBN:fi:jyu-201505251973

Metadata
Show full item record
Collections
  • Pro gradu -tutkielmat [24512]

Related items

Showing items with similar title or keywords.

  • Changes in nocturnal heart rate variability and endurance performance during a high-intensity or high-volume endurance training period in recreational endurance runners 

    Partanen, Juho (2014)
    It is known that endurance training affects the modulation of the autonomic nervous system and heart rate variability (HRV). As a method HRV may be a potential tool to monitor trainability and endurance training adaptation. ...
  • Sympathoadrenal response to resistance exercise in men, women and pubescent boys : with special reference to interaction with other hormones and neuromuscular performance 

    Pullinen, Teemu (University of Jyväskylä, 2001)
  • Priming the Motor Cortex With Anodal Transcranial Direct Current Stimulation Affects the Acute Inhibitory Corticospinal Responses to Strength Training 

    Frazer, Ashlyn; Howatson, Glyn; Ahtiainen, Juha; Avela, Janne; Rantalainen, Timo; Kidgell, Dawson (Lippincott, Williams & Wilkins; National Strength and Conditioning Association, 2019)
    Synaptic plasticity in the motor cortex (M1) is associated with strength training (ST) and can be modified by transcranial direct current stimulation (tDCS). The M1 responses to ST increase when anodal tDCS is applied ...
  • Neural responses to fatiguing heavy-resistance loading before and after prolonged strength training 

    Tikkanen, Olli (2006)
    Acute effects and recovery from exercise-induced fatigue is widely studied, but there is a lack of data concerning adaptations to acute fatigue with strength training. The purpose of this study was to examine neural ...
  • Improved Maximum Strength, Vertical Jump and Sprint Performance after 8 Weeks of Jump Squat Training with Individualized Loads 

    Vanderka, Marián; Longová, Katarina; Olasz, Dávid; Krčmár, Matús; Walker, Simon (Journal of Sports Science and Medicine, 2016)
    The purpose of the study was to determine the effects of 8 weeks of jump squat training on isometric half squat maximal force production (Fmax) and rate of force development over 100ms (RFD100), countermovement jump ...
  • Browse materials
  • Browse materials
  • Articles
  • Conferences and seminars
  • Electronic books
  • Historical maps
  • Journals
  • Tunes and musical notes
  • Photographs
  • Presentations and posters
  • Publication series
  • Research reports
  • Research data
  • Study materials
  • Theses

Browse

All of JYXCollection listBy Issue DateAuthorsSubjectsPublished inDepartmentDiscipline

My Account

Login

Statistics

View Usage Statistics
  • How to publish in JYX?
  • Self-archiving
  • Publish Your Thesis Online
  • Publishing Your Dissertation
  • Publication services

Open Science at the JYU
 
Data Protection Description

Accessibility Statement

Unless otherwise specified, publicly available JYX metadata (excluding abstracts) may be freely reused under the CC0 waiver.
Open Science Centre