János Négyesi

Verified

János verified their affiliation via an institutional email.

Learn more

Verified

János verified their affiliation via an institutional email.

Learn more

• Doctor of Medicine
• Professor (Assistant) at Hungarian University of Sports Science

The aim of our pilot study was to investigate the effects of offensive and defensive strategy conditions on external and internal training load factors in male tennis players. This study included six elite junior male tennis players (chronological age: 15.7 ± 1.0; body height: 180.7 ± 6.5 cm; body mass: 71.0 ± 10.8 kg) who had to play two simulated...

The aim of our pilot study was to investigate the effects of offensive and defensive strategy conditions on external and internal training load factors in male tennis players. The study included 6 elite junior male tennis players (chronological age: 15.7 ± 1.0; body height: 180.7 ± 6.5 cm; body mass: 71.0 ± 10.8 kg) who had to play two simulated ma...

Visually emotive stimuli modulate postural control via cognitive pathways, and while colored lenses alter emotional responses, their impact on postural control remains uncertain. Previous studies showed that individually optimized colored glasses enhanced reading performance. However, it remains unclear if these effects extend to postural control....

Vision plays a fundamental role in the control of human locomotion, including walking gait. Given that side-dominance is associated with differences in motor control, the present study aimed to determine if patches obscuring half of the visual field affect left- and right-side dominant individuals’ gait kinematics and accompanying leg muscle activa...

Human movement is influenced by emotions, yet their effect on proprioceptive behavior remains unclear. This study examined how emotions impact ankle joint proprioception during ipsilateral and contralateral target-matching tasks. Twenty participants performed ankle matching tasks under four conditions: no music, happy, sad, and neutral. Emotional s...

Emotions have the potential to modulate human voluntary movement by modifying muscle afferent discharge which in turn may affect kinesthetic acuity. We examined if heart rate (HR)-related physiological changes induced by music-elicited emotions would underlie alterations in healthy young adults’ ankle joint target-matching strategy quantified by jo...

INTRODUCTION: Tennis requires a specific preparation of the players in the spirit of their playing style [1]. Four playing styles are distinguished (counterpuncher, aggressive baseliner, serve and volleyer, and all-court player), which are predominantly associated with various technical-tactical elements of an offensive or defensive strategy [2]. O...

Background: The use of individually preferred colored glasses has gained popularity with the expectation that it may improve balance control and sports performance, however, the results of previous studies remain inconclusive. Aim of the study: In the present pilot study, we aimed to determine the association between participants’ subjective prefer...

Neurocognitive assessment tools have been proposed to optimize, maintain, and improve perceptual-cognitive performance. Here, we investigated the feasibility and efficacy of a novel neurofeedback system, neuroMoon (nM), on cognitive abilities compared with one of the most popular perceptual-cognitive training (PCT) tools both in sports and rehabili...

Footstrike pattern has received increased attention within the running community because there is a common belief that forefoot strike running (FFS) is more advantageous (i.e., improve performance and reduce running injuries) than rearfoot strike running (RFS) in distance running. Literature reports suggest greater knee joint flexion magnitude and...

Background The prone plank test has been often used to assess the strength and endurance of trunk muscles. We aimed to develop a new measurement protocol to objectively monitor the changes in spinal curves and muscle activity simultaneously. Methods Eleven adolescent male basketball athletes (13–17 years) performed a one-minute plank test. Spinal...

A könyvet személyes tapasztalatokon alapuló motiváció ihlette, abból a célból íródott, hogy egy kicsit kézzelfoghatóbbá, könnyebben értelmezhetővé tegye a statisztika sporttudományokban történő alkalmazását. Remélem, hogy a könyvben leírtakkal sikerül megértetnünk a sportteljesítmény monitorozásának, és az eredményeink statisztikai elemzésének font...

Patients undergoing unilateral orthopedic or neurological rehabilitation have different levels of impairments in the right- or left-dominant hand. However, how handedness and the complexity of the motor task affect motor skill acquisition and its interlimb transfer remains unknown. In the present study, participants performed finger key presses on...

Background Aerobic exercise (AE) may slow age-related cognitive decline. However, such cognition-sparing effects are not uniform across cognitive domains and studies. Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation and is also emerging as a potential alternative to pharmaceutical therapies. Like AE, the ef...

We examined the effects of side-dominance on the laterality of standing stability using ground reaction force, motion capture (MoCap), and EMG data in healthy young adults. We recruited participants with strong right (n = 15) and left (n = 9) hand and leg dominance (side-dominance). They stood on one or two legs on a pair of synchronized force plat...

Background There is a need to develop strategies that could contribute to the physical and mental preparation of motorsport athletes. A common method used by experienced motorsport athlete physical trainers is flashing light devices to train or assess reactive agility, despite limited evidence. Therefore, in the present study, we determined the eff...

Background: The use of compression garments (CGs) during or after training and competition has gained popularity in the last few decades. However, the data concerning CGs’ beneficial effects on muscle strength-related outcomes after physical exercise remain inconclusive. Objective: The aim was to determine whether wearing CGs during or after physi...

Purpose: Task complexity could affect acquisition efficiency of motor skills and interlimb transfer; however, how task complexity affects interlimb transfer remains unclear. We hypothesized that left- and right-handed participants may have different interlimb transfer efficiency depending on the task complexity. Methods: Left-hand (n=28) and right...

Environmental carbon dioxide (CO2) could affect various mental and physiological activities in humans, but its effect on daytime sleepiness is still controversial. In a randomized and counterbalanced crossover study with twelve healthy volunteers, we applied a combinational approach using classical frequentist and Bayesian statistics to analyze the...

Due to the microdamage, caused by high tension in the muscle, contractile strength decreases along with the modification of the muscle’s myoelectric (EMG) activity. In the present study, we hypothesized that strength attenuation of knee extensors, as well as the change in knee extensor and biceps femoris EMG activity, is joint-angle-specific. Using...

Featured Application This work provides a collection of validated basketball-related field tests and test packages intended to aid coaches and other experts in the selection of tests and the building of testing protocols. In addition to collecting study results using these tests, practical advice on test planning and execution is also given to help...

Basketball is one of the most popular team sports in the world. A wide variety of athletic skills can be valuable indicators of a talented player. Testing these skills help trainers and scouts to make the best decisions during both youth and adult player selection of different competitive levels and field positions. However, scientific data regardi...

Purpose: We examined the possibility that wearing a below-knee compression garment (CG) reduces fatigue-induced strength loss and joint position sense (JPS) errors in healthy adults. Methods: Subjects (n = 24, age = 25.5 ± 4 years) were allocated to either one of the treatment groups that performed 100 maximal isokinetic eccentric contractions at...

BACKGROUND: Background: Although previous studies targeted S1 by TMS to investigate its effect on the corticospinal pathway, there is no evidence if such stimuli produced by TMS would distinctly be restricted to it and not reach M1 interneurons adjacent to S1. AIM: The aim of the present pilot study was to determine the effects of stimulation locat...

Motor skill practice improves performance not only in the trained - but also in the untrained contralateral limb - a phenomenon called as interlimb transfer. Handedness affects motor skill acquisition and interlimb transfer, but it remains unknown whether handedness affects interlimb transfer when practicing with the dominant or non-dominant limb....

Aim: Right-handed young adults perform target-matching tasks more accurately with the non-dominant (ND) compared to the dominant (D) limb, but it is unclear if age affects this disparity. We determined if age affects target-matching asymmetry in right-side dominant healthy adults. Method: Young (n = 12, age: 23.6 y, 6 females) and older (n = 12; ag...

Athletes use compression garments (CGs) to improve sport performance, accelerate rehabilitation from knee injuries or to enhance joint position sense (JPS). The position of CGs around the knee may affect knee JPS but the data is inconsistent. The purpose of the present study was to determine the effects of CG position on healthy adults' knee joint...

Aims: Right- and left-side-dominant individuals reveal target-matching asymmetries between joints of the dominant and non-dominant upper limbs. However, it is unclear if such asymmetries are also present in lower limb's joints. We hypothesized that right-side-dominant participants perform knee joint target-matching tasks more accurately with their...

We determined the effects of wearing an above-knee compression garment (CG) on knee joint position sense. Healthy young adults (n = 24, age = 27.46 ± 4.65 years) performed a passive knee position-matching task on an isokinetic dynamometer with each leg separately. We determined the magnitude of compression by measuring anatomical thigh cross sectio...

Supporting data for the experimental condition in both the right dominant and the left non-dominant legs. (XLSX)

Supporting data for the control condition in both the right dominant and the left non-dominant legs. (XLSX)

Aims The aim of this study was to examine the effects of gender on the relationship between Functional Movement Screen (FMS) and treadmill-based gait parameters. Methods Twenty elite junior athletes (10 women and 10 men) performed the FMS tests and gait analysis at a fixed speed. Between-gender differences were calculated for the relationship betw...

Sensory input can modify motor function and magnify interlimb transfer. We examined the effects of low-intensity somatosensory electrical stimulation (SES) on motor practice-induced (MP) skill acquisition and intermanual transfer. Participants practiced a visuomotor skill for 25 minutes and received SES to the practice or the transfer arm. Response...

Isokinetic training is widely used to increase muscle strength and power through the adaptation of neurological control of muscle fiber recruitment. We report the effect of 10 dinamometric exercise training on a Hungarian sprinter champion using a HUMAC Norm dynamometer. The subject produced lower forces with both left extensors and flexors compare...

BACKGROUND: The effects of stretch-shortening cycle (SSC) training are well-described in the literature but the mechanism of how it changes the characteristics of the SSC moment-time curve and contraction velocity is unknown. OBJECTIVE: The purpose of the present study was to investigate the adaptation mechanisms of the knee extensor contractile pr...

Purpose: In a previous study, we reported that a short-interval intracortical inhibition (SICI) decreases in old but not in young adults when standing on foam vs. a rigid surface. Here, we examined if such an age by task difficulty interaction in motor cortical excitability also occurs in easier standing tasks. Methods: Fourteen young (23 ± 2.7...

Sensory input can modify voluntary motor function. We examined whether somatosensory electrical stimulation (SES) added to motor practice (MP) could augment motor learning, interlimb transfer, and whether physiological changes in neuronal excitability underlie these changes. Participants (18-30 years, n = 31) received MP, SES, MP + SES, or a contro...