scholarly journals Alterations in mechanical muscle characteristics and postural control induced by tennis match-play in young players

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11445
Author(s):  
Joshua Colomar ◽  
Francisco Corbi ◽  
Ernest Baiget
Keyword(s):  
Postural Control ◽  
Surface Area ◽  
Moderate Activity ◽  
Match Play ◽  
Tennis Players ◽  
Eyes Open ◽  
Displacement Speed ◽  
The Right ◽  
The Impact ◽  
Tennis Match

Background Central and peripheric fatigue indicators are among the main reasons for performance decline following competition. Because of the impact of these factors on performance, how these variables are affected by match-play could be of interest, especially in young tennis players. Objective This study aimed to investigate alterations induced by a simulated tennis match on postural control and muscle characteristics in young tennis players. Method Seventeen male junior players took part in pre- and post-competition testing sessions performing postural control (displacement, speed and surface area of center of pressures) and muscle characteristics measurements (tone, stiffness, time to relaxation and elasticity). Between trials, participants played an 80-min simulated tennis match. Results No significant differences were observed in any of the tested variables. Moderate-to-large effect sizes (ES) for decreased stiffness and tone and greater time to relaxation were found between pre- and post-conditions in the right rectus abdominis (−9.8%, −4.4% and 7.8%; ES = 0.8, 0.54 and −0.85). Also, a decrease in tone was found in the right vastus medialis (−7.1%; ES = 0.56), while surface area of the center of pressures with eyes open showed trends towards increasing in post-match measurements (55.9%; ES = 0.56). Conclusion An 80-min simulated tennis match seems insufficient to elicit significant changes in postural control and mechanical muscle characteristics. Results suggest that physiological responses triggered by match-play were closer to those seen after a moderate activity than those present following a strenuous task.

scholarly journals Consecutive Days of Prolonged Tennis Match Play: Performance, Physical, and Perceptual Responses in Trained Players

2015 ◽  
Vol 10 (7) ◽  
pp. 913-920 ◽  
Author(s):  
Danielle T. Gescheit ◽  
Stuart J. Cormack ◽  
Machar Reid ◽  
Rob Duffield
Keyword(s):  
Effect Size ◽  
Perceived Exertion ◽  
Voluntary Contraction ◽  
Rating Of Perceived Exertion ◽  
Perceptual Training ◽  
Match Play ◽  
Tennis Players ◽  
Playing Time ◽  
Distress Scale ◽  
Tennis Match

Purpose:To determine how consecutive days of prolonged tennis match play affect performance, physiological, and perceptual responses.Methods:Seven well-trained male tennis players completed 4-h tennis matches on 4 consecutive days. Pre- and postmatch measures involved tennis-specific (serve speed and accuracy), physical (20-m sprint, countermovement jump [CMJ], shoulder-rotation maximal voluntary contraction, isometric midthigh pull), perceptual (Training Distress Scale, soreness), and physiological (creatine kinase [CK]) responses. Activity profile was assessed by heart rate, 3D load (accumulated accelerations measured by triaxial accelerometers), and rating of perceived exertion (RPE). Statistical analysis compared within- and between-days values. Changes (± 90% confidence interval [CI]) ≥75% likely to exceed the smallest important effect size (0.2) were considered practically important.Results:3D load reduced on days 2 to 4 (mean effect size ± 90% CI –1.46 ± 0.40) and effective playing time reduced on days 3 to 4 (–0.37 ± 0.51) compared with day 1. RPE did not differ and total points played only declined on day 3 (–0.38 ± 1.02). Postmatch 20-m sprint (0.79 ± 0.77) and prematch CMJ (–0.43 ± 0.27) performance declined on days 2 to 4 compared with prematch day 1. Although serve velocity was maintained, compromised postmatch serve accuracy was evident compared with prematch day 1 (0.52 ± 0.58). CK increased each day, as did ratings of muscle soreness and fatigue.Conclusions:Players reduced external physical loads, through declines in movement, over 4 consecutive days of prolonged competitive tennis. This may be affected by tactical changes and pacing strategies. Alongside this, impairments in sprinting and jumping ability, perceptual and biochemical markers of muscle damage, and reduced mood states may be a function of neuromuscular and perceptual fatigue.

Impact of Opponents’ Clothing and Body Language on Impression Formation and Outcome Expectations

2005 ◽  
Vol 27 (1) ◽  
pp. 39-52 ◽  
Author(s):  
Iain Greenlees ◽  
Richard Buscombe ◽  
Richard Thelwell ◽  
Tim Holder ◽  
Matthew Rimmer
Keyword(s):  
Nonverbal Communication ◽  
Impression Formation ◽  
Interactive Effect ◽  
Outcome Expectations ◽  
Body Language ◽  
Tennis Player ◽  
Tennis Players ◽  
The Impact ◽  
Tennis Match

The aim of this study was to examine the impact of a tennis player’s body language and clothing (general vs. sport-specific) on the impressions observers form of them. Forty male tennis players viewed videos of a target tennis player warming up. Each participant viewed the target player displaying one of four combinations of body language and clothing (positive body language/tennis-specific clothing; positive body language/general sportswear; negative body language/tennis-specific clothing; negative body language/general sportswear). After viewing the target player, participants rated their impressions of the model’s episodic states and dispositions and gave their perceptions of the likely outcome of a tennis match with the target player. Analyses of variance revealed that positive body language led to favorable episodic impressions and low outcome expectations. Analysis also indicated that clothing and body language had an interactive effect on dispositional judgments. The study supports the contention that nonverbal communication can influence sporting interactions.

scholarly journals The acute effect of match-play on hip range of motion and isometric strength in elite tennis players

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7940 ◽  
Author(s):  
Victor Moreno-Pérez ◽  
Fabio Yuzo Nakamura ◽  
Violeta Sánchez-Migallón ◽  
Raul Domínguez ◽  
Valentín Emilio Fernández-Elías ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Perceived Exertion ◽  
Acute Effect ◽  
Isometric Strength ◽  
Rating Of Perceived Exertion ◽  
Strength Ratio ◽  
Match Play ◽  
Tennis Players ◽  
Hip Range Of Motion ◽  
Tennis Match

Background Groin injuries are some of the most common injuries tennis players suffer. Several factors (e.g., post-match decrease in hip adductor (ADD) strength) have been proposed as possible mechanisms for increasing the incidence of this type of injury. However, the risk factors of developing groin injuries after a tennis match have not yet been delineated. Objective The aim of this study was to determine the effect of tennis match-play on isometric ADD and abductor (ABD) strength and passive hip range of motion (ROM). Methods Twenty-six male tennis players (20.30 ± 4.98 years) took part in this study. Participants completed an evaluation of strength and flexibility hip measurements before and after a simulated tennis match. Dominant and non-dominant passive hip ROM, ADD and ABD isometric strength, and the ADD/ABD strength ratio were measured before and immediately post-match. A global positioning system (GPS) and a session rating of perceived exertion (RPE) were used to assess the locomotive demands and internal match load. Results Isometric dominant ADD strength (17.8%, p ≤ 0.01) and ADD/ABD strength ratio (11.6%, p = 0.04) were lower post-match compared to the pre-match values. No between-limbs differences were observed for isometric ADD strength, ABD strength, and passive hip ROM tests. RPE showed an expected increase between pre- vs. post-match (pre- vs. post-warming-up, 3.42 ± 2.08 vs. 5.62 ± 2.29, p < 0.01). In addition, a significant relationship between ADD strength and the volume of tennis practice per week was found, stablishing that tennis players with lower volume of training per week suffered a reduction in ADD strength in their dominant limb after match-play (r = 0.420, p = 0.04). Conclusion The assessment of ADD strength and the ADD/ABD strength ratio in the dominant limb may be considered a post-match tool that can be used to identify players who require rest and additional recovery strategies before competing again.

Fluid-Electrolyte Balance Associated with Tennis Match Play in a Hot Environment

1995 ◽  
Vol 5 (3) ◽  
pp. 180-193 ◽  
Author(s):  
Michael F. Bergeron ◽  
Carl M. Maresh ◽  
Lawrence E. Armstrong ◽  
Joseph F. Signorile ◽  
John W. Castellani ◽  
...  
Keyword(s):  
Division I ◽  
Electrolyte Balance ◽  
Dietary Intakes ◽  
Match Play ◽  
Tennis Players ◽  
Weight Percentage ◽  
Hot Environment ◽  
Males And Females ◽  
Sweat Sodium ◽  
Tennis Match

Twenty (12 male and 8 female) tennis players from two Division I university tennis teams performed three days of round-robin tournament play (i.e., two singles tennis matches followed by one doubles match per day) in a hot environment (32.2 ±and 53.9 ± 2.4% rh at 1200 hr), so that fluid-electrolyte balance could be evaluated. During singles play, body weight percentage changes were minimal and were similar for males and females (males -1.3 ± 0.8%, females -0.7 ± 0.8%). Estimated daily losses (mmol ·) of sweat sodium (Na+) and potassium (K+) (males,158.7,31.3; females,86.5,18.9) were met by the players' daily dietary intakes (mmol ·) of these electrolytes (males,279.1 ± 109.4,173.5 ± 57.7; females,178.9 ± 68.9,116.1 ± 37.5). Daily plasma volume and electrolyte (Na+,) levels were generally conserved, although, plasma [Na+] was lower (p< .05) on the morning of Day 4. This study indicated that these athletes generally maintained overall fluid-electrolyte balance, in response to playing multiple tennis matches on 3 successive days in a hot environment, without the occurrence of heat illness.

Wheelchair Tennis Match-Play Demands: Effect of Player Rank and Result

2013 ◽  
Vol 8 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Paul Sindall ◽  
John P. Lenton ◽  
Keith Tolfrey ◽  
Rory A. Cooper ◽  
Michelle Oyster ◽  
...  
Keyword(s):  
Data Logger ◽  
Match Play ◽  
Tennis Players ◽  
Main Effect ◽  
Low Performance ◽  
Playing Time ◽  
Open Class ◽  
Main Effects ◽  
Practical Recommendations ◽  
Tennis Match

Purpose:To examine the heart-rate (HR) response and court-movement variables during wheelchair tennis match play for high- (HIGH) and low- (LOW) performance-ranked players. Analysis of physiological and movement-based responses during match play offers an insight into the demands of tennis, allowing practical recommendations to be made.Methods:Fourteen male open-class players were monitored during tournament match play. A data logger was used to record distance and speed. HR was recorded during match play.Results:Significant rank-by-result interactions revealed that HIGH winners covered more forward distance than HIGH losers (P < .05) and had higher average (P < .05) and minimum (P < .01) HRs than LOW winners. LOW losers had higher average (P < .01) and minimum (P < .001) HRs than LOW winners. Independent of result, a significant main effect for rank was identified for maximum (P < .001) and average (P < .001) speed and total (P < .001), reverse (P < .001), and forward-to-reverse (P < .001) distance, with higher values for HIGH. Independent of rank, losing players experienced higher minimum HRs (P < .05). Main effects for maximum HR and actual playing time were not significant. Average playing time was 52.0 (9.1) min.Conclusions:These data suggest that independent of rank, tennis players were active for sufficient time to confer health-enhancing effects. While the relative playing intensity is similar, HIGH players push faster and farther than LOW players. HIGH players are therefore more capable of responding to ball movement and the challenges of competitive match play. Adjustments to the sport may be required to encourage skill developmental in LOW players, who move at significantly lower speeds and cover less distance.

scholarly journals Three-Week Intensive Neuromuscular Training Improves Postural Control in Professional Male Soccer Players

2019 ◽  
Vol 26 (2) ◽  
pp. 14-20
Author(s):  
Małgorzata Kowalczyk ◽  
Paweł Tomaszewski ◽  
Natalia Bartoszek ◽  
Marcin Popieluch
Keyword(s):  
Postural Control ◽  
Training Programme ◽  
Soccer Players ◽  
Neuromuscular Training ◽  
Control Group ◽  
Professional Soccer ◽  
Short Period ◽  
Eyes Open ◽  
The Impact ◽  
Experimental Group

Abstract Introduction. The purpose of this study was to determine the impact of a short-term, three-week intensive neuromuscular training programme on the postural stability of professional soccer players and to establish whether lower-limb dominance affects one-leg stability. Material and methods. The experimental group consisted of 16 professional male soccer players, and the control group included 20 professional soccer players who did not undergo any additional training. The experimental group was provided with three-stage progressive training twice a day over a three-week period during the preparatory period and then trained twice per week in-season for a period of 5 months. The experimental subjects were evaluated with the use of a stabilographic platform before the programme, 3 weeks into the programme, and finally after 5 months from its commencement. Total centre of pressure (COP) sway path was measured during one leg stance for the dominant and non-dominant leg with eyes open and closed. Results. After three weeks of training, the experimental group showed a significantly shorter COP path for the measurements taken with both open (p < 0.001; η2 = 0.28) and closed eyes (p < 0.05; η2 = 0.09) compared to the initial results. It was found that the training effects were sustained five months into the training programme for the tests with eyes open (p < 0.001) and eyes closed (p < 0.05). The control group, however, showed no such improvement during that time. No differences were found between the limbs in either of the groups. Conclusions. Neuromuscular training can be effective for postural control improvement in professional male soccer players within a short period of time. Leg dominance does not affect one-leg stability.

Interdependence of Vision and Audition among Inexperienced and Experienced Tennis Players

1997 ◽  
Vol 85 (1) ◽  
pp. 163-166 ◽  
Author(s):  
Tim P. Mead ◽  
John N. Drowatzky
Keyword(s):  
Reaction Time ◽  
Response Time ◽  
The Other ◽  
Auditory Signal ◽  
Tennis Ball ◽  
Tennis Players ◽  
The Subject ◽  
The Right ◽  
The Impact

Experienced ( n = 14) and inexperienced ( n = 12) tennis players were tested for response to a tennis ball hit to either the right, left, or directly at them under two auditory conditions. In one condition, subjects heard the impact of the ball against the racquet strings. In the other condition, subjects wore sound protectors that completely eliminated the auditory signal. In the latter condition reaction time was slowed when the ball was hit directly at the subject. Experienced and inexperienced tennis players were equally affected, indicating prior interdependence of audition and vision in tennis. No difference in response time was observed for groups of differing experience.

Emotional Reactivity to Visual Content as Revealed by ERP Component Clustering

2015 ◽  
Vol 29 (4) ◽  
pp. 135-146 ◽  
Author(s):  
Miroslaw Wyczesany ◽  
Szczepan J. Grzybowski ◽  
Jan Kaiser
Keyword(s):  
Emotional Reactivity ◽  
Brain Activity ◽  
Affective State ◽  
Occipital Lobe ◽  
Stimulus Onset ◽  
Emotional States ◽  
Neural Basis ◽  
Temporoparietal Junction ◽  
The Right ◽  
The Impact

Abstract. In the study, the neural basis of emotional reactivity was investigated. Reactivity was operationalized as the impact of emotional pictures on the self-reported ongoing affective state. It was used to divide the subjects into high- and low-responders groups. Independent sources of brain activity were identified, localized with the DIPFIT method, and clustered across subjects to analyse the visual evoked potentials to affective pictures. Four of the identified clusters revealed effects of reactivity. The earliest two started about 120 ms from the stimulus onset and were located in the occipital lobe and the right temporoparietal junction. Another two with a latency of 200 ms were found in the orbitofrontal and the right dorsolateral cortices. Additionally, differences in pre-stimulus alpha level over the visual cortex were observed between the groups. The attentional modulation of perceptual processes is proposed as an early source of emotional reactivity, which forms an automatic mechanism of affective control. The role of top-down processes in affective appraisal and, finally, the experience of ongoing emotional states is also discussed.

The Impact of Internal Work Environment on the Retention of Healthcare Providers at Turaif General Hospital

2019 ◽  
Vol 10 (12) ◽  
pp. 1183-1199
Author(s):  
Mohammed Alrouili ◽  
Keyword(s):  
Work Environment ◽  
General Hospital ◽  
Professional Growth ◽  
Healthcare Providers ◽  
Entire Study ◽  
Internal Work ◽  
Research Findings ◽  
Study Population ◽  
The Right ◽  
The Impact

This study attempted to identify the impact of internal work environment on the retention of healthcare providers at Turaif General Hospital in the Kingdom of Saudi Arabia. In particular, the study aimed to identify the dimensions of work circumstances, compensation, and relationship with colleagues, professional growth, and the level of healthcare providers’ retention. In order to achieve the study goals, the researcher used the descriptive analytical approach. The researcher used the questionnaire as the study tool. The study population comprised all the healthcare providers at Turaif General Hospital. Questionnaires were distributed to the entire study sample that consisted of 220 individuals. The number of questionnaires valid for study was 183 questionnaires. The research findings were as follows: the participants’ estimate of the work circumstances dimension was high (3.64), the participants’ estimate of the compensation dimension was moderate (3.32), the participants’ estimate of the relationship with colleagues dimension was high (3.62), the participants’ estimate of the professional growth dimension was weak (2.39), and the participants’ estimate of healthcare providers’ retention level was intermediate (2.75). Accordingly, the researcher’s major recommendations are: the need to create the right atmosphere for personnel in hospitals, the interest of the hospital to provide the appropriate conditions for the staff in terms of the physical and moral aspects for building the work adjustment in the staff, and conducting training courses and educational lectures for personnel in hospitals on how to cope with the work pressures.

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