EFFECTIVENESS OF TWO SHORT DURATION (4 WEEK & 6 WEEK) PLYOMETRIC TRAINING ON AGILITY PERFORMANCE IN SEMI - PROFESSIONAL FOOTBALL PLAYERS (A COMPARATIVE STUDY)

2021 ◽  
pp. 53-55
Author(s):  
Abraar Siddiqui ◽  
Manali Desai (PT) ◽  
Mayuri Ghumatkar (PT) ◽  
Ajay Kumar (PT)
Keyword(s):  
Short Duration ◽  
Professional Training ◽  
Training Programs ◽  
Football Players ◽  
Professional Football ◽  
Plyometric Training ◽  
Short Term ◽  
Intergroup Comparison ◽  
Before And After ◽  
And Control

Background: Plyometric training (PT) has been shown to improve agility among sports which require aerobic endurance. Semi-professional football players need a short-term training program which will improve their performance in competitive matches even due to time constraint or lack of professional training. The study aims to identify effectiveness of two short duration program 4 week or 6-week plyometric training on agility in semi-professional football players. Method: In this comparative experimental study, 45 semi-professional football players were selected and randomly divided into three groups. One group underwent 4 weeks of plyometric training, other group 6 weeks of plyometric training and control was third group. All the participants performed Agility T test before and after completion of training. Result: Data was recorded and used for statistical analysis. There was statistically signicant difference between pre (15.05 + 0.81) seconds and post (14.8 + 0.58) seconds values after 4- weeks of Plyometric training & pre (15.05 + 0.81) seconds and post (14.4 + 0.70) seconds values after 6- weeks of plyometric training. Intergroup comparison between all three groups showed no difference between 4 weeks and 6 weeks of plyometric training. (p>0.05) Conclusion: Thus, our study shows that both the short-term training programs are equally effective in improving agility among semi – professional football players.

scholarly journals Effect of Resisted Sprint and Plyometric Training on Lower Limb Functional Performance in Collegiate Male Football Players: A Randomised Control Trial

2021 ◽  
Vol 18 (13) ◽  
pp. 6702
Author(s):  
Shahnaz Hasan ◽  
Gokulakannan Kandasamy ◽  
Danah Alyahya ◽  
Asma Alonazi ◽  
Azfar Jamal ◽  
...  
Keyword(s):  
Functional Performance ◽  
Group Analysis ◽  
Training Group ◽  
Control Group ◽  
Football Players ◽  
Plyometric Training ◽  
Sprint Training ◽  
Short Term ◽  
Hop Test ◽  
Collegiate Football

The main objectives of this study were to evaluate the short-term effects of resisted sprint and plyometric training on sprint performance together with lower limb physiological and functional performance in collegiate football players. Ninety collegiate football players participated in this three-arm, parallel group randomized controlled trial study. Participants were randomly divided into a control group and two experimental groups: resisted sprint training (RST) (n = 30), plyometric training (PT) (n = 30), and a control group (n = 30). Participants received their respective training program for six weeks on alternate days. The primary outcome measures were a knee extensor strength test (measured by an ISOMOVE dynamometer), a sprint test and a single leg triple hop test. Measurements were taken at baseline and after 6 weeks post-training. Participants, caregivers, and those assigning the outcomes were blinded to the group assignment. A mixed design analysis of variance was used to compare between groups, within-group and the interaction between time and group. A within-group analysis revealed a significant difference (p < 0.05) when compared to the baseline with the 6 weeks post-intervention scores for all the outcomes including STN (RST: d = 1.63; PT: d = 2.38; Control: d = 2.26), ST (RST: d = 1.21; PT: d = 1.36; Control: d = 0.38), and SLTHT (RST: d = 0.76; PT: d = 0.61; Control: d = 0.18). A sub-group analysis demonstrated an increase in strength in the plyometric training group (95% CI 14.73 to 15.09, p = 0.00), an increase in the single leg triple hop test in the resisted sprint training group (95% CI 516.41 to 538.4, p = 0.05), and the sprint test was also improved in both experimental groups (95% CI 8.54 to 8.82, p = 0.00). Our findings suggest that, during a short-term training period, RST or PT training are equally capable of enhancing the neuromechanical capacities of collegiate football players. No adverse events were reported by the participants.

scholarly journals Effects of Short-Term Plyometric Training on Agility, Jump and Repeated Sprint Performance in Female Soccer Players

2021 ◽  
Vol 18 (5) ◽  
pp. 2274
Author(s):  
Marcin Maciejczyk ◽  
Renata Błyszczuk ◽  
Aleksander Drwal ◽  
Beata Nowak ◽  
Marek Strzała
Keyword(s):  
Physical Performance ◽  
Sprint Performance ◽  
Soccer Players ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Short Term ◽  
Jump Performance ◽  
Squat Jump ◽  
Repeated Sprint ◽  
Before And After

The aim of the study was to determine the effects of short-term (4 weeks, twice a week: 8 sessions) plyometric training on agility, jump, and repeated sprint performance in female soccer players. The study comprised 17 females performing this sports discipline. The players were randomly divided into two groups: with plyometric training (PLY) and the control (CON). All players followed the same training program, but the PLY group also performed plyometric exercises. Tests used to evaluate physical performance were carried out immediately before and after PLY. After implementing the short PLY training, significant improvement in jump performance (squat jump: p = 0.04, ES = 0.48, countermovement jump: p = 0.009, ES = 0.42) and agility (p = 0.003, ES = 0.7) was noted in the PLY group. In the CON group, no significant (p > 0.05) changes in physical performance were observed. In contrast, PLY did not improve repeated sprint performance (p > 0.05) among female soccer players. In our research, it was shown that PLY can also be effective when performed for only 4 weeks instead of the 6–12 weeks typically applied.

A Comparative Study on Short-Term Effects of Compression Orthosis and Exercises in the Treatment of Pectus Carinatum: A Randomized Controlled Pilot Feasibility Trial

2020 ◽  
Author(s):  
Esra Giray ◽  
Nezih Onur Ermerak ◽  
Yeliz Bahar-Ozdemir ◽  
Melihat Kalkandelen ◽  
Mustafa Yuksel ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Chest Wall ◽  
Feasibility Trial ◽  
Control Group ◽  
Pectus Carinatum ◽  
Short Term ◽  
Similar Frequency ◽  
Custom Made ◽  
Before And After ◽  
And Control

Abstract Introduction Pectus carinatum (PC) is a congenital chest wall deformity which is characterized by the protrusion of the sternum and costal cartilages. Although orthotic and exercise therapies are commonly offered by physicians for PC treatment, there is a lack of evidence on the benefits of exercises and how long the orthosis should be worn. The aim of this study is to investigate the effects and feasibility of custom-made compression orthosis and exercises in the treatment of PC. Materials and Methods Patients with PC aged 7 to 17 years old were randomized into three groups: compression orthosis 23 hours, compression orthosis 8 hours, and control group. All groups received exercises for 1 hour a day for 3 weeks. Additionally, compression orthosis 23 hours group wore the orthosis for 23 hours a day, while compression orthosis 8 hours group wore the orthosis for 8 hours a day. PC protrusion, pressure of correction, thorax lateral and anteroposterior parameters, external chest wall measurements, and Nuss Questionnaire were evaluated before and after the treatment. Also, adverse effects, retention, and compliance were assessed. Feasibility was evaluated by calculating the percentages of recruitment, retention, and safety. Results The compression orthosis 23 hours group showed greater improvements than the other groups. After treatment, all groups showed significant changes in protrusion, pressure of correction, and external chest wall measurements. Adverse events occurred with similar frequency across groups. Retention percentages did not differ among groups. Conclusion Compression orthosis use for 23 hours can be recommended rather than its use for 8 hours because 23 hours of orthosis use has better correction and similar adverse effects.

scholarly journals Effectiveness of Ladder Training Versus Plyometric Training Program on Agility in Kabaddi Players

2021 ◽  
Vol 11 (11) ◽  
pp. 320-334
Author(s):  
K Venkata Surya Prakash ◽  
Pachamatla Devi Sadvika ◽  
Ch Ashok Chakravarthi
Keyword(s):  
Experimental Approach ◽  
Training Programme ◽  
Plyometric Training ◽  
Training Strategy ◽  
Before And After ◽  
Quasi Experimental ◽  
Convenience Sampling ◽  
Level Of Significance ◽  
And Control ◽  
Training Protocol

Background: Sport specific training in Kabaddi players should also focus on agility in consistent with demand of the sport. Since Ladder training and Plyometric training improves agility, it can be useful training strategy to improve the performance of Kabaddi players. Ladder training is more effective and also help the player to catch, strike, and to block or tackle the component, whereas Plyometric training enhances balance and control of body positions during game. Methodology: A comparative study design had made use of Quasi experimental approach by convenience sampling to select 60 samples of semiprofessional Kabaddi players in the age of 18- 25 students of both genders studying in KIMS College of Physiotherapy, Amalapuram. On certain predetermined criteria with a formal written consent samples were taken. The data was gathered following Interventions using Ladder training and Plyometric training protocol which was administered on the Kabaddi players. The outcome measures were assessed before the intervention and at the end of Eighth week. The standardized tool named Agility T-test was taken to assess the Agility before and after the intervention. Result of the Study: The result of the study indicated that Ladder training is a useful training strategy to improve agility more in Kabaddi players than Plyometric training programme. Whereas level of significance taken is P=<0.05. And obtained level of significance P<0.00. Conclusion: This study concluded that Ladder training is a useful training strategy to improve agility than Plyometric training programme in Kabaddi players. Key words: Agility, Ladder Training, Plyometrics, Kabaddi.

scholarly journals Effects of Unloaded vs. Ankle-Loaded Plyometric Training on the Physical Fitness of U-17 Male Soccer Players

2020 ◽  
Vol 17 (21) ◽  
pp. 7877
Author(s):  
Mehrez Hammami ◽  
Nawel Gaamouri ◽  
Katsuhiko Suzuki ◽  
Ridha Aouadi ◽  
Roy J. Shephard ◽  
...  
Keyword(s):  
Physical Fitness ◽  
Training Programs ◽  
Dynamic Balance ◽  
Soccer Players ◽  
Plyometric Training ◽  
Recovery Test ◽  
Change Of Direction ◽  
Performance Group ◽  
And Control ◽  
The Impact

The aim of this study was to compare the impact of two differing plyometric training programs (loaded plyometrics (with 2.5% of body mass placed above the ankle joint) vs. unloaded plyometrics), performed biweekly for 10 weeks, on the physical fitness of elite junior male soccer players. Participants aged 16.0 ± 0.5 years were randomly assigned between unloaded plyometrics (UP; n = 12), loaded plyometrics (LP; n = 14) and control (C; n = 12) groups. Two-way analyses of performance (group x time) were assessed by 40-m sprint times; 9–3–6–3–9 m sprints with 180° turns (S180°); 9–3–6–3–9 m sprints with backward and forward running (SBF); and 4 × 5 m sprints (S4 × 5 m); four jump tests; measures of static and dynamic balance; repeated change of direction tests and the Yo-Yo intermittent recovery test. Both LP and UP enhanced sprinting performance relative to C (p < 0.05) but performance increased more in LP relative to UP (p < 0.05) in all sprints except 40 m. Change of direction times were also significantly shortened by LP relative to UP (p < 0.05) and C (p < 0.01) in all tests, with no significant differences between UP and C. Jumps heights increased similarly in both LP and UP relative to C (p < 0.05), with no significance between LP and UP. LP and UP also enhanced repeated change of direction scores relative to C (p < 0.01) with greater changes in LP than in UP (p < 0.01). Finally, LP enhanced some balance scores relative to UP (p < 0.05) and C (p < 0.05). We conclude that the introduction of 10 weeks of in-season loaded plyometrics into the regimen of U17 male soccer players yields gains in several physical performance scores relative to either unloaded plyometrics or the control training regimen.

Diel variations in the effect of spates on mayflies (Ephemeroptera: Baetis)

1992 ◽  
Vol 70 (9) ◽  
pp. 1696-1700 ◽  
Author(s):  
Jill Lancaster
Keyword(s):  
Size Distribution ◽  
Field Experiments ◽  
Apparent Effect ◽  
Short Term ◽  
Creek Water ◽  
Diel Variations ◽  
Before And After ◽  
And Control

Field experiments were carried out to determine whether there are diel variations in the effect of spates on baetid mayflies. Short-term spates were created in experimental streamside channels by pumping filtered creek water into selected channels at various times of day, resulting in three- or four-fold increases in discharge. Drift samples were collected before, during, and after spates; benthic samples were collected before and after. Drift rates of Baetis from channels in spate were higher than controls at all times of day. Natural increases in drift were observed in all channels after sunset, and drift rates from channels in spate were highest at this time. The susceptibility of nymphs to drift from channels was calculated as the ratio of drift densities in spate and control channels. Baetis appeared to be more vulnerable to spates after sunset than at dawn or midday. In unmanipulataed flow, large nymphs occurred most frequently in the drift after sunset. Spates had no apparent effect on the size distribution of nymphs in the drift compared with unmanipulated flows at the same time. These spates were not large enough and (or) long enough to greatly decrease mayfly densities in the benthos. It is notable, however, that benthic densities of Baetis were reduced significantly only by one spate at dusk.

Monitoring Accelerations With GPS in Football: Time to Slow Down?

2014 ◽  
Vol 9 (3) ◽  
pp. 442-445 ◽  
Author(s):  
Martin Buchheit ◽  
Hani Al Haddad ◽  
Ben M. Simpson ◽  
Dino Palazzi ◽  
Pitre C. Bourdon ◽  
...  
Keyword(s):  
Football Players ◽  
Gps Data ◽  
Professional Football ◽  
Confidence Limits ◽  
Custom Made ◽  
Before And After ◽  
Maximal Speed ◽  
Software Updates ◽  
Peak Speed ◽  
Simulated Match

The aims of the current study were to examine the magnitude of between-GPS-models differences in commonly reported running-based measures in football, examine between-units variability, and assess the effect of software updates on these measures. Fifty identical-brand GPS units (15 SPI-proX and 35 SPIproX2, 15 Hz, GPSports, Canberra, Australia) were attached to a custom-made plastic sled towed by a player performing simulated match running activities. GPS data collected during training sessions over 4 wk from 4 professional football players (N = 53 files) were also analyzed before and after 2 manufacturersupplied software updates. There were substantial differences between the different models (eg, standardized difference for the number of acceleration >4 m/s2 = 2.1; 90% confidence limits [1.4, 2.7], with 100% chance of a true difference). Between-units variations ranged from 1% (maximal speed) to 56% (number of deceleration >4 m/s2). Some GPS units measured 2–6 times more acceleration/deceleration occurrences than others. Software updates did not substantially affect the distance covered at different speeds or peak speed reached, but 1 of the updates led to large and small decreases in the occurrence of accelerations (–1.24; –1.32, –1.15) and decelerations (–0.45; –0.48, –0.41), respectively. Practitioners are advised to apply care when comparing data collected with different models or units or when updating their software. The metrics of accelerations and decelerations show the most variability in GPS monitoring and must be interpreted cautiously.

Effect of Concussions on the Performance of Running Backs and Wide Receivers in the National Football League

2019 ◽  
Vol 47 (11) ◽  
pp. 2717-2722 ◽  
Author(s):  
Toufic R. Jildeh ◽  
Kelechi R. Okoroha ◽  
Kevin A. Taylor ◽  
Patrick Buckley ◽  
Samir Mehta ◽  
...  
Keyword(s):  
National Football League ◽  
Individual Performance ◽  
High Rate ◽  
Return To Play ◽  
Control Group ◽  
Football Players ◽  
Professional Football ◽  
Significant Difference ◽  
Before And After ◽  
Player Performance

Background: Concussion injuries are common in professional football players; however, their effect on player performance remains unclear. Purpose: To quantify the effect of concussions on the performance of running backs and wide receivers in professional football players. Study Design: Cohort study; Level of evidence, 3. Methods: Concussion data from the National Football League were collected for a period of 4 seasons (2012-2015) for running backs and wide receivers. Age, experience, position, time to return to play, yearly total yards, and touchdowns were recorded. A power rating (total yards divided by 10 plus touchdowns multiplied by 6) was calculated for each player’s injury season as well as for the 3 seasons before and after their respective injury. A control group of running backs and wide receivers without an identified concussion injury who competed in the 2012 season was assembled for comparison. Player performance up to 3 seasons before and after the injury season was examined to assess acute and longitudinal changes in player performance. Results: A total of 38 eligible running backs and wide receivers sustained a concussion during the study period. Thirty-four (89%) players were able to return to competition in the same season, missing an average of 1.5 ± 0.9 games; the remaining 4 players returned in the subsequent season. Power ratings for concussed players were similar to those of controls throughout the study period. Concussed players did not suffer an individual performance decline upon returning within the same season. Furthermore, no significant difference in change of power rating was observed in concussed players in the acute (±1 year from injury; −1.2 ± 4.8 vs –1.1 ± 3.9, P = .199) or chronic (±3 years from injury; –3.6 ± 8.0 vs –3.0 ± 4.5, P = .219) setting compared with controls. All concussed players successfully returned to competition in either the index or next season. Conclusion: A high rate of National Football League running backs and wide receivers are able to return to play after a concussion injury. These players were found to perform at a similar level in both the acute and long-term period after concussion.

scholarly journals Muscle injury rate in professional football is higher in matches played within 5 days since the previous match: a 14-year prospective study with more than 130 000 match observations

2017 ◽  
Vol 52 (17) ◽  
pp. 1116-1122 ◽  
Author(s):  
Håkan Bengtsson ◽  
Jan Ekstrand ◽  
Markus Waldén ◽  
Martin Hägglund
Keyword(s):  
Rate Ratio ◽  
Muscle Injury ◽  
Injury Rate ◽  
Football Players ◽  
Professional Football ◽  
Short Term ◽  
Injury Rates ◽  
Reference Category ◽  
Individual Player

BackgroundThe association between match congestion and injury rates in professional football has yielded conflicting results.AimTo analyse associations between match congestion on an individual player level and injury rates during professional football matches.MethodsData from a prospective cohort study of professional football with 133 170 match observations were analysed with Poisson regressions. Associations between short-term match congestion, defined as number of days between two match exposures (≤3, 4, 5, 6 and 7–10 days) and injury rates were analysed. To analyse the influence of long-term match congestion, defined as individual match exposure hours in the 30 days preceding a match, observations were categorised into three groups (low, ≤4.5; medium, >4.5 to ≤7.5; and high, >7.5 hours).ResultsNo differences in total match injury rates were found between the reference category (≤3 days) and the other categories of short-term congestion. Muscle injury rates were significantly lower in matches preceded by 6 (rate ratio (RR) 0.79; 95% CI 0.65 to 0.95) or 7–10 days (RR 0.81; 95% CI 0.71 to 0.93) compared with ≤3 days since the last match exposure. No differences in total and muscle injury rates between the three long-term match congestion groups were found.ConclusionsIn this study of male professional football players, there were no match congestion-related differences in total match injury rates, but muscle injury rates during matches were lower when players were given at least 6 days between their match exposures.

scholarly journals Effect of short-term peripheral myopic defocus on ocular biometrics using Fresnel “press-on” lenses in humans 

2021 ◽  
Author(s):  
Ryo Kubota ◽  
Nabin R Joshi ◽  
Inna Samandarova ◽  
Maksud Oliva ◽  
Arkady Selenow ◽  
...  
Keyword(s):  
Axial Length ◽  
Choroidal Thickness ◽  
Fresnel Lens ◽  
Short Term ◽  
Full Field ◽  
Before And After ◽  
The Mean ◽  
The Difference ◽  
The Right ◽  
And Control

Abstract This study assessed axial length and choroidal thickness changes following short-term peripheral myopic defocus in normal adult subjects. Twenty subjects underwent defocus sessions by viewing a full-field projected movie 4 meters away for 4 hours in the morning, while wearing spectacle lenses, corrected for distance vision in both eyes. The right eye, serving as the test eye, was peripherally defocused using a Fresnel lens overlay of + 3.50D with a central aperture of 11.5 mm, while the left eye served as the control. A subset of 10 subjects from the same cohort also underwent additional defocus sessions with + 5.00D of peripheral defocus. Axial length was measured and radial sub-foveal choroidal scans were obtained before and after the defocus sessions. The mean increase in axial length of the test eyes was 8 µm (p < 0.05) less than that of the control eyes with + 3.50D peripheral defocus condition and 14 µm (p < 0.05) less than the control eyes with + 5.00 D peripheral defocus condition. The difference in mean changes for choroidal thickness between test and control eyes were not significant for both dioptric conditions. Our results demonstrated that short-term peripheral myopic defocus significantly inhibited axial elongation in adult humans, without significant changes in choroidal thickness.

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