Effects of Mental Fatigue Induced by Social Media Use on Volleyball Decision-Making, Endurance, and Countermovement Jump Performance

2021 ◽  
pp. 003151252110405
Author(s):  
Leonardo S. Fortes ◽  
Fabiano S. Fonseca ◽  
Fabio Y. Nakamura ◽  
Bruno Teixeira Barbosa ◽  
Petrus Gantois ◽  
...  
Keyword(s):  
Decision Making ◽  
Social Media ◽  
Interaction Effect ◽  
Training Session ◽  
Young Male ◽  
Mental Fatigue ◽  
Countermovement Jump ◽  
Significant Group ◽  
Jump Performance ◽  
Time Interaction

We studied the effects of repeated inducements of mental fatigue (MF) from using social media on smartphones immediately before training sessions by young male volleyball athletes, focusing specifically on their decision-making, endurance, and countermovement jump performance (CMJ). We pair-matched 24 participants according to their decision-making abilities and then, randomly assigned them to one of two 4-week block training groups: control (CON) and smartphone use (SMA). For a 30-minute period before each training session, the CON group watched TV and the SMA group used social media apps on smartphones. We found a significant group x time interaction effect for decision making (attack, p = 0.03; passing, p = 0.02) during training blocks. More specifically, only the CON group improved their decision making (attack, p = 0.03; passing, p = 0.02). Both groups significantly improved their CMJ performance ( p = .01), with no significant group x time interaction effect for CMJ ( p = 0.91). Neither group significantly improved their endurance ( p = 0.56). We concluded that 30-minutes of repetitive social media app use on a smartphone immediately before 4-weeks of volleyball training sessions negatively affected decision-making in young male volleyball athletes.

Playing videogames or using social media applications on smartphones causes mental fatigue and impairs decision-making performance in amateur boxers

2021 ◽  
pp. 1-12
Author(s):  
Leonardo Sousa Fortes ◽  
Petrus Gantois ◽  
Dalton de Lima-Júnior ◽  
Bruno Teixeira Barbosa ◽  
Maria Elisa Caputo Ferreira ◽  
...  
Keyword(s):  
Decision Making ◽  
Social Media ◽  
Mental Fatigue ◽  
Media Applications

Strength Training Using Elastic Bands: Improvement of Muscle Power and Throwing Performance in Young Female Handball Players

2017 ◽  
Vol 26 (3) ◽  
pp. 245-252 ◽  
Author(s):  
Naryana Cristina Mascarin ◽  
Claudio Andre Barbosa de Lira ◽  
Rodrigo Luiz Vancini ◽  
Alberto de Castro Pochini ◽  
Antonio Carlos da Silva ◽  
...  
Keyword(s):  
Strength Training ◽  
Outcome Measures ◽  
Interaction Effect ◽  
Muscle Power ◽  
Young Female ◽  
Muscle Performance ◽  
Significant Group ◽  
Ball Speed ◽  
Time Interaction ◽  
Elastic Bands

Context:Imbalance in shoulder-rotator muscles has been considered a risk factor for injuries in handball. Strength training programs (STPs) may play an important preventive role.Objective:To verify the effects of an STP using elastic bands on shoulder muscles and ball-throwing speed.Design:Randomized and prospective controlled trial.Setting:Exercise physiology laboratory.Participants:Thirty-nine female handball players were randomly assigned to an experimental (EG, n = 21, 15.3 ± 1.1 y) or a control (CG, n = 18, 15.0 ± 0.8 y) group.Intervention:The EG performed the STP with elastic-band progressive exercises for 6 wk before regular handball training, and the CG underwent only their regular training.Main Outcome Measures:Before and after the STP, both groups underwent a ball-throwing-speed test and isokinetic test to assess shoulder internal- (IR) and external-rotator muscle performance.Results:Average power values for IR muscles presented a significant group-vs-time interaction effect (F = 3.9, P = .05); EG presented significantly higher values after the STP (P = .03). Ball speed presented higher values in EG after the STP in standing (P = .04) and jumping (P = .03) throws. IR peak-torque values and balance in shoulder-rotator muscles presented no group-vs-time interaction effect.Conclusions:STP using elastic bands performed for 6 wk was effective to improve muscle power and ball speed for young female handball players.

scholarly journals Effects of Slackline Training on Acceleration, Agility, Jump Performance and Postural Control in Youth Soccer Players

2019 ◽  
Vol 67 (1) ◽  
pp. 235-245
Author(s):  
Javier Fernández-Rio ◽  
Luis Santos ◽  
Benjamín Fernández-García ◽  
Roberto Robles ◽  
Iván Casquero ◽  
...  
Keyword(s):  
Postural Control ◽  
Training Program ◽  
Perceived Exertion ◽  
Center Of Pressure ◽  
Training Session ◽  
Soccer Players ◽  
Control Group ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Squat Jump

AbstractThe goal of this study was to assess the effects of a supervised slackline training program in a group of soccer players. Thirty-four male division I under-19 players (16.64 ± 0.81 years) agreed to participate in the study. They were randomly divided into an experimental group (EG) and a control group (CG). The first group (EG) followed a 6-week supervised slackline training program (3 sessions/week; 5-9 min/session), while the CG performed only regular soccer training. Several variables were assessed in all participants: acceleration (20-m sprint test), agility (90º turns test), jump performance (squat jump, countermovement jump), and postural control (Center of Pressure ( CoP) testing: length, area, speed, Xmean, Ymean, Xspeed, Yspeed, Xdeviation, Ydeviation). Ratings of perceived exertion and local muscle ratings of perceived exertions were also recorded after each slackline training session. At post-tests, there was a significant increase only in the EG in acceleration, agility, squat jump and countermovement jump performance, as well as several CoP variables: area in the bipedal support on a firm surface, and length, area and speed in the left leg on a firm surface. The program was rated as “somewhat hard” by the players, while quadriceps, gastrocnemius and tibialis anterior were the most exerted muscles while slacklining. In conclusion, slackline training can be an effective training tool for young, high-level soccer players.

scholarly journals Effects of Graded Exergames on Fitness Performance in Elementary School Children With Developmental Coordination Disorder

2021 ◽  
Vol 3 ◽  
Author(s):  
Bouwien Smits-Engelsman ◽  
Emmanuel Bonney ◽  
Gillian Ferguson
Keyword(s):  
Motor Coordination ◽  
Developmental Coordination Disorder ◽  
Training Session ◽  
Positive Influence ◽  
Training Period ◽  
Physical And Mental Health ◽  
Significant Group ◽  
Time Interaction ◽  
Coordination Disorder ◽  
Aerobic And Anaerobic

Developmental Coordination Disorder (DCD) is a common childhood disorder affecting movement and coordination skills, fitness, and academic performance. Increased physical fitness may have a positive influence on physical and mental health outcomes in children with DCD. Yet, little has been done to develop interventions to improve fitness performance in this group. The purpose of this study was to determine the effects of graded exergames in 7 to 12-year-old children with DCD and typically developing (TD) peers. Participants (32 DCD and 28 TD children) received a 30-min training session twice weekly for 10 weeks. Performance on motor coordination (MABC-2 test), balance, aerobic, and anaerobic fitness tests were assessed at the beginning and end of training. In addition, enjoyment and perception of exertion were measured for each participant during the training period. Both children with DCD and TD children significantly improved on motor coordination, balance, aerobic, and anaerobic fitness at the end of the training. A significant Group by Time interaction was observed on the MABC-2 total [F(1, 55) = 13.19; p < 0.001] and balance scores [F(1, 55) = 26.83; p < 0.0001], with the DCD group demonstrating larger improvements than the TD children. Both groups enjoyed the program throughout the training period even though they rated the training to be of high intensity. These findings indicate that graded exergames may serve as potential treatment for impaired fitness in children with DCD. Regular participation in graded exergames in school settings may be needed to enhance and maintain fitness performance in young children with and without DCD.

scholarly journals A cloth facemask increased ratings of perceived exertion and reduced affect, but did not affect sprint or muscular performance during training in athletes

2021 ◽  
Author(s):  
Matheus Dantas ◽  
Rui Barbosa Neto ◽  
Natália Mendes Guardieiro ◽  
Ana Lucia de Sá Pinto ◽  
Bruno Gualano ◽  
...  
Keyword(s):  
Exercise Performance ◽  
Perceived Exertion ◽  
Vertical Jump ◽  
Training Session ◽  
Face Mask ◽  
Time Data ◽  
Ratings Of Perceived Exertion ◽  
Jump Performance ◽  
Sprint Time ◽  
Time Interaction

During the COVID-19 pandemic, the necessity of using face masks during sports is likely balanced by coaches and athletes between the risk of infection and their impact on exercise performance. To inform this decision, we aimed to test the effects of wearing a cloth face mask on exercise performance and subjective responses during training of track and field athletes. Participants (n=10) performed two training sessions with and without a 3-layered cloth mask in a randomized, counterbalanced, crossover design. The training session was designed to simulate the specific demands of the sport that the athletes practiced. The sprint protocol consisted of performing five maximal 30 m sprints, with a passive 4-min interval between runs. Performance variables (sprint time, acceleration) were calculated using the sprint time data. Jump performance was assessed pre- and post-sprints using a countermovement vertical jump. Throughout the training session, ratings of perceived exertion (RPE) and affect were collected. There was no evidence of condition x time interactions for sprint time (P=0.21) or acceleration (P=0.47). There was weak evidence of an effect of condition (P=0.05) on RPE, though no evidence of a condition x time interaction (P=0.35). There was moderate evidence of a condition x time interaction (P=0.02) for affect, with lower ratings following sprints 3, 4 and 5 when using the mask. These findings suggest that wearing a mask may negatively impact subjective feelings of training without necessarily harming sprint performance. During an unmitigated epidemic such as in Brazil, the protection against SARS-CoV-2 infection associated with wearing a face mask appears to outweigh the increased discomfort and perception of effort related to this safety tool.

scholarly journals Slackline Training in Children with Spastic Cerebral Palsy: A Randomized Clinical Trial

2020 ◽  
Vol 17 (22) ◽  
pp. 8649
Author(s):  
Lucía González ◽  
Juan Argüelles ◽  
Vicente González ◽  
Kristian Winge ◽  
Marta Iscar ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Postural Control ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Spastic Cerebral Palsy ◽  
Control Group ◽  
Significant Group ◽  
Jump Performance ◽  
Time Interaction ◽  
Static Posturography

Objective: To assess whether a slackline intervention program improves postural control in children/adolescents with spastic cerebral palsy (CP). Design: Randomized controlled trial. Setting: Patients’ association. Participants: Twenty-seven children/adolescents with spastic CP (9–16 years) were randomly assigned to a slackline intervention (n = 14, 13 ± 3 years) or control group (n = 13, 12 ± 2 years). Intervention: Three slackline sessions per week (30 min/session) for 6 weeks. Main outcome measures: The primary outcome was static posturography (center of pressure—CoP—parameters). The secondary outcomes were surface myoelectrical activity of the lower-limb muscles during the posturography test and jump performance (countermovement jump test and Abalakov test). Overall (RPE, >6–20 scale) rating of perceived exertion was recorded at the end of each intervention session. Results: The intervention was perceived as “very light” (RPE = 7.6 ± 0.6). The intervention yielded significant benefits on static posturography (a significant group by time interaction on Xspeed, p = 0.006) and jump performance (a significant group by time interaction on Abalakov test, p = 0.015). Conclusions: Slackline training improved static postural control and motor skills and was perceived as non-fatiguing in children/adolescents with spastic CP.

The Effects of Reducing Social Media Use on Body Esteem Among Transitional-Aged Youth

2021 ◽  
Vol 40 (6) ◽  
pp. 481-507
Author(s):  
Helen Thai ◽  
Christopher G. Davis ◽  
Niall Stewart ◽  
Katie E. Gunnell ◽  
Gary S. Goldfield
Keyword(s):  
Social Media ◽  
Emotional Distress ◽  
Media Use ◽  
Body Esteem ◽  
High Risk Population ◽  
Social Media Use ◽  
Significant Group ◽  
Time Interaction ◽  
Group Time ◽  
Transitional Aged Youth

Introduction. Social media use (SMU) and body image concerns are highly prevalent in youth. Although several studies have shown that high SMU is crosssectionally associated with lower body esteem, experimental evidence is lacking. This pilot study experimentally evaluated the effects of reducing SMU on body esteem among transitional aged youth (TAY) with emotional distress. Methods. Thirty-eight undergraduate students presenting with elevated symptoms of anxiety/depression were randomly assigned to the intervention (n = 16), where SMU was restricted to 60 minutes/day, or to the control group (n = 22), where SMU was not restricted. SMU was monitored via screen-time trackers in participants’ smartphone submitted daily during baseline (1-week) and intervention (3-week) periods. Baseline and post-intervention measurements were taken to assess appearance and weight esteem as well as symptoms of anxiety and depression as secondary outcomes. Results. A significant group × time interaction emerged indicating that the intervention participants showed a significantly greater increase in appearance esteem over the 4 weeks compared to controls. There was no significant between-group difference on change in weight esteem. A significant group × time interaction emerge on anxiety indicating that intervention participants showed a significantly greater improvement in anxiety over the study period compared to controls. There was no significant between-group difference on change in depressive symptoms. Discussion. Reducing SMU may be a feasible and effective method of improving appearance esteem and reducing anxiety in a high-risk population of TAY with emotional distress; however, more high-quality randomized controlled trials are needed to confirm findings.

scholarly journals Relationship Between Jumping Ability, Agility and Sprint Performance of Elite Young Basketball Players: A Field-Test Approach

2016 ◽  
Vol 18 (2) ◽  
pp. 177 ◽  
Author(s):  
Abbas Asadi
Keyword(s):  
National Level ◽  
Young Male ◽  
Sprint Performance ◽  
Strongly Correlated ◽  
Strong Correlations ◽  
Countermovement Jump ◽  
Basketball Players ◽  
Jump Performance ◽  
Sprint Time ◽  
Long Jump

DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n2p177 The purpose of this study was to determine the relationships between sprint, agility and jump performance of elite young basketball players. Sixteen elite national level young male basketball players participated in this study. The jumping ability of each player was determined using countermovement jump (CMJ), and broad long jump (BLJ). The agility T test (TT) and Illinois agility test (IAT) were assessed to determine the agility, and 20-m sprint time was also measured to determine sprint performance. The results of Pearson Product Moment Correlation analysis indicated moderate correlation between training age and IAT (r = -0.57; p = 0.021). Strong correlations were found between CMJ and BLJ (r = 0.71; p = 0.002), and between TT and IAT (r = 0.70; p = 0.002). Similarly, 20-m sprint time was strong correlated with CMJ (r = -0.61; p = 0.011), BLJ (r = -0.76; p = 0.001), TT (r = 0.77; p = 0.001), and IAT (r = 0.68; p = 0.003). In addition, CMJ was strongly correlated with TT (r = -0.60; p = 0.013), and IAT (r = -0.64; p = 0.007), and also strong correlation between BLJ with TT (r = -0.85; p = 0.001) and IAT (r = -0.76; p = 0.001). The findings of the present study indicated significant correlation between sprint and agility, jumping ability and sprint performance and between jumping ability and agility performance in basketball players. Therefore, the results suggest that sprint, agility and jumping ability share common physiological and biomechanical determinants. 

scholarly journals Traditional Versus Velocity-Based Resistance Training in Competitive Female Cyclists: A Randomized Controlled Trial

2021 ◽  
Vol 12 ◽  
Author(s):  
Almudena Montalvo-Pérez ◽  
Lidia B. Alejo ◽  
Pedro L. Valenzuela ◽  
Jaime Gil-Cabrera ◽  
Eduardo Talavera ◽  
...  
Keyword(s):  
Body Composition ◽  
Resistance Training ◽  
Muscle Strength ◽  
Interaction Effect ◽  
Controlled Trial ◽  
Time Trial ◽  
Endurance Performance ◽  
Short Term ◽  
Significant Group ◽  
Time Interaction

We assessed the effects of a short-term velocity-based resistance training (VBRT, where exercise intensity is individualized based on the loads and repetitions that maximize power output) program compared with traditional resistance training (TRT, where the same number of repetitions and relative load are used for every individual) on body composition, muscle strength/power, and endurance performance in competitive female cyclists. Seventeen participants were randomly assigned to 6 weeks (two sessions/week) of TRT (n = 8) or VBRT (n = 9), during which they maintained their usual endurance program. Both interventions included squat, hip thrust, and split squat exercises. Training loads were continuously registered, and outcomes were measures of muscle strength/power, body composition, and endurance performance (incremental test and 8-min time trial). No differences between TRT and VBRT groups were found for overall internal training loads during resistance training or cycling sessions (p > 0.05). Both interventions led to significant improvements in all strength/power-related outcomes, but VBRT induced greater improvements than TRT in maximum muscle strength and power as assessed with the hip thrust exercise (p < 0.05 for the group by time interaction effect). However, no significant group by time interaction effect was found for body composition or endurance performance-related outcomes. In conclusion, the addition of a short-term intervention of VBRT or TRT to the usual training regimen of competitive female cyclists improves muscle strength/power, albeit VBRT might induce superior gains on maximum strength/power for the hip thrust exercise.

scholarly journals Effects of In-Season Velocity- Versus Percentage-Based Training in Academy Rugby League Players

2020 ◽  
Vol 15 (4) ◽  
pp. 554-561 ◽  
Author(s):  
Samuel T. Orange ◽  
James W. Metcalfe ◽  
Ashley Robinson ◽  
Mark J. Applegarth ◽  
Andreas Liefeith
Keyword(s):  
Training Session ◽  
Rugby League ◽  
Velocity Versus ◽  
Strength Index ◽  
Countermovement Jump ◽  
Perceptual Training ◽  
Jump Performance ◽  
Back Squat ◽  
Mean Differences ◽  
Training Stress

Purpose: To compare the effects of velocity-based training (VBT) vs percentage-based training (PBT) on strength, speed, and jump performance in academy rugby league players during a 7-wk in-season mesocycle. Methods: A total of 27 rugby league players competing in the Super League U19s Championship were randomized to VBT (n = 12) or PBT (n = 15). Both groups completed a 7-wk resistance-training intervention (2×/wk) that involved the back squat. The PBT group used a fixed load based on a percentage of 1-repetition maximum (1-RM), whereas the VBT group used a modifiable load based on individualized velocity thresholds. Biomechanical and perceptual data were collected during each training session. Back-squat 1-RM, countermovement jump, reactive strength index, sprint times, and back-squat velocity at 40–90% 1-RM were assessed pretraining and posttraining. Results: The PBT group showed likely to most likely improvements in 1-RM strength and reactive strength index, whereas the VBT group showed likely to very likely improvements in 1-RM strength, countermovement jump height, and back-squat velocity at 40% and 60% 1-RM. Sessional velocity and power were most likely greater during VBT compared with PBT (standardized mean differences = 1.8–2.4), while time under tension and perceptual training stress were likely lower (standardized mean differences = 0.49–0.66). The improvement in back-squat velocity at 60% 1-RM was likely greater following VBT compared with PBT (standardized mean difference = 0.50). Conclusion: VBT can be implemented during the competitive season, instead of traditional PBT, to improve training stimuli, decrease training stress, and promote velocity-specific adaptations.

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