Search results for "lihastoiminta"
showing 10 items of 50 documents
Design of a Programmable and Modular Neuromuscular Electrical Stimulator Integrated Into a Wireless Body Sensor Network
2021
Neuromuscular electrical stimulation finds application in several fields, from basic neurophysiology, to motor rehabilitation and cardiovascular conditioning. Despite the progressively increasing interest in this technique, its State-of-the-Art technology is mainly based on monolithic, mostly wired devices, leading to two main issues. First, these devices are often bulky, limiting their usability in applied contexts. Second, the possibility of interfacing these stimulation devices with external systems for the acquisition of electrophysiological and biomechanical variables to control the stimulation output is often limited. The aim of this work is to describe the design and development of a…
Kalevalaisen jäsenkorjauksen yhteydet kävelyn biomekaniikkaan ja hermolihasjärjestelmän toimintaan
2017
Rutanen, Petra Maria, 2016. Kalevalaisen jäsenkorjauksen yhteydet kävelyn biomekaniikkaan ja hermolihasjärjestelmän toimintaan. Biomekaniikan pro gradu – tutkielma. Liikuntabiologian laitos. Jyväskylän yliopisto. 59 s. Alaselkäkipua kokee tutkimusten mukaan 80% väestöstä jossain vaiheessa elämäänsä, ja se on suuri terveydellinen ja sosioekonominen taakka. Alaselkäkivusta kärsivillä todetaan usein muutoksia biomekaanisessa toiminnassa sisältäen mm. muutoksia liikemalleissa, hermolihasjärjestelmän toiminnassa, lihasaktiivisuuksissa ja vartalon rotaatiossa. Alaselkäkivusta kärsiville on tehty useita tutkimuksia, joissa interventiona on erilaisia liikunta- tai hoitomuotoja. Tässä tutkimuksessa …
Effects of caffeine on neuromuscular function in a non‐fatigued state and during fatiguing exercise
2020
New findings What is the central question of the study? What are the effects of caffeine on neuromuscular function in a non-fatigued state and during fatiguing exercise? What is the main finding and its importance? In a non-fatigued state, caffeine decreased the duration of the silent period evoked by transcranial magnetic stimulation. Caffeine-induced reduction of inhibitory mechanisms in the central nervous system before exercise was associated with an increased performance. Individuals who benefit from caffeine ingestion may experience lower perception of effort during exercise and an accelerated recovery of M-wave amplitude postfatigue. This study elucidates the mechanisms of action of …
Modulation of H-reflex and V-wave responses during dynamic balance perturbations
2023
AbstractMotoneuron excitability is possible to measure using H-reflex and V-wave responses. However, it is not known how the motor control is organized, how the H-reflex and V-wave responses modulate and how repeatable these are during dynamic balance perturbations. To assess the repeatability, 16 participants (8 men, 8 women) went through two, identical measurement sessions with ~ 48 h intervals, where maximal isometric plantar flexion (IMVC) and dynamic balance perturbations in horizontal, anterior–posterior direction were performed. Soleus muscle (SOL) neural modulation during balance perturbations were measured at 40, 70, 100 and 130 ms after ankle movement by using both H-reflex and V-…
Concurrent endurance and strength training : neuromuscular, cardiorespiratory and hormonal effects of the exercise order in previously untrained and …
2015
The aim of the present thesis was two-fold. First, to investigate physiological adaptations to concurrent endurance and strength training performed in the same session with different exercise orders (i.e. commencing training with endurance or strength, respectively; E+S vs. S+E) in previously untrained men (n=42) (study 1). Second, to examine physiological adaptations when strength training was always performed immediately after endurance running in the same session (E+S) compared to endurance training alone (E) in recreational endurance runners (n=30) (study 2). In study 1, training consisted of 2 - 3 weekly combined endurance cycling and mixed hypertrophic and maximal strength training se…
Neuromuscular function during knee exercises in water : with special reference to hydrodynamics and therapy
2002
The present series of studies examined neuromuscular function during knee exercise in water and training responses of an aquatic exercise program. Emphasis was placed on the quantification of water resistance, the drag. Subjects who participated in this series of studies were 25-35-year-old healthy women and men. Neuromuscular function was examined using electromyography (EMG), force and reflex sensitivity measurements in the isometric condition on land and in water. EMG and angular velocity were measured during dynamic knee extension-flexion in still and flowing water. The drag forces acting on the leg and foot model were measured in the barefoot condition and with a large resistance boot.
Neuromuscular adaptations to single-session combined strength and endurance training in untrained men : an examination of the order effect
2013
Understanding the adaptations to single-session combined strength (S) and endurance (E) training has received increased attention in scientific literature through the expand-ing use of combined training programs for practical purposes. However, the intra-session exercise order when performing both E and S in the same training session may limit potential strength development, as the neuromuscular adaptations to either training mode alone are very different. Research on the effect of the intra-session exercise order of combined training on various training-induced adaptations, i.e. the order effect, is currently limited, especially with regard to the neuromuscular adaptations. Therefore, the …