scholarly journals The relationship among repeated sprint and change of direction abilities in football players with cerebral palsy

Kinesiology ◽  
2020 ◽  
Vol 52 (2) ◽  
pp. 208-216
Author(s):  
Matías Javier Henríquez ◽  
Marco Kokaly ◽  
Felipe Herrera ◽  
Raul Reina
Keyword(s):  
Cerebral Palsy ◽  
Lactate Concentration ◽  
Football Players ◽  
Sprint Time ◽  
Change Of Direction ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Before And After ◽  
The Difference ◽  
The Relationship

This study aimed to describe and determine relationships between repeated sprint and change of direction (COD) abilities in football players with cerebral palsy according to four sport classes (FT5 to FT8). Seventeen male football players with cerebral palsy took part in this study (23.0±4.7 years, 65.9±9.5 kg, 168.8±5.9 cm). The repeated sprint ability (6×40-m sprints with a 20-second recovery) was evaluated to determine the best sprint time, mean sprint time, and percentage of sprint decrement. The difference in lactate concentration was determined using blood samples taken three minutes before and after testing. The Illinois Agility Test (IAT) was also used to assess players’ change of direction ability. The FT8 players had better performance (p<.01) in the best sprint time, mean sprint time and in the IAT scores compared to the players of the sport classes FT5/6. Players of the sport class FT7 also reached higher performance in the IAT compared to the players of the sport classes FT5/6 (p<.05). A significant correlation was found between the best sprint time and mean sprint time (r=.94, p<.01), the best sprint time and the IAT (r=.62, p<.01), and between the best sprint time and the difference in lactate concentration (r=-.51, p<.05). The relationships between repeated sprint and change of direction abilities demonstrate the performance profile of para-footballers with cerebral palsy in those variables according to their sport classes, exhibiting lower performance than the values reported for regular football players.

Velocity and Power–Load Association of Bench-Press Exercise in Wheelchair Basketball Players and their Relationships With Field-Test Performance

2019 ◽  
Vol 14 (7) ◽  
pp. 880-886 ◽  
Author(s):  
Aitor Iturricastillo ◽  
Cristina Granados ◽  
Raúl Reina ◽  
José Manuel Sarabia ◽  
Ander Romarate ◽  
...  
Keyword(s):  
Inverse Relationship ◽  
Bench Press ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Ability Test ◽  
Change Of Direction ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
The Relationship ◽  
Sprint Ability

Purpose: To analyze the relationship between mean propulsive velocity (MPV) of the bar and relative load (percentage of the 1-repetition maximum [%1RM]) in the bench-press (BP) exercise and to determine the relationship of power variables (ie, mean concentric power [MP], mean propulsive power [MPP], and peak power [PP]) in change-of-direction ability, linear sprint, and repeated-sprint ability. Methods: A total of 9 Spanish First Division wheelchair basketball players participated in the study. All participants performed an isoinertial BP test in free execution mode, a 505 change-of-direction ability test, linear sprint test (20 m), and repeated-sprint ability test. Results: A nearly perfect and inverse relationship was observed for the BP exercise between the %1RM and MPV (r = −.97, R2 = .945, P < .001). The maximum loads for MP, MPP, and PP were obtained between 48.1% and 59.4% of the 1RM. However, no significant correlations were observed between strength and wheelchair performance. Conclusions: Wheelchair basketball players with different functional impairments showed a nearly perfect and inverse relationship for the BP exercise between the %1RM and MPV; thus the MPV could be used to estimate the %1RM. This finding has important practical applications for velocity-based resistance training in that coaches would be able to prescribe and monitor training load. Conversely, the absence of association between BP performance and field tests might be due to other factors such as the wheelchair–user interface, trunk-muscle activity, or propulsion technique, apart from strength variables.

The Relationship Between Repeated Sprint Performances and 50m and 100m Swimming Degrees of Swimmers

2021 ◽  
Vol 15 (9) ◽  
pp. 3076-3079
Author(s):  
Ayşegül Yapici Öksüzoğlu ◽  
Engin Güneş Atabaş
Keyword(s):  
Short Distance ◽  
Swimming Performance ◽  
Difficulty Level ◽  
Swimming Time ◽  
Sprint Time ◽  
Repeated Sprint Ability ◽  
Significant Relationships ◽  
Repeated Sprint ◽  
The Relationship ◽  
Sprint Ability

The aim of this study is to investigate the relationship between short distance swimming performance and repeated sprint ability in swimmers. 12 male swimmers between the ages of 14-18 from Denizli Pamukkale University Swimming Sports Club Performance team voluntarily participated at this study. Freestyle swimming time of the subjects was measured by using Casio stopwatch. 10x15-m, 50-m and 100-m freestyle swimming degrees of swimmers were recorded. The ideal sprint time (IS), the total sprint time (TS) and the performance decrement (PD) were determined after repeated sprint test (RST). Lactate levels were recorded at the end of each test. The Borg scale was used to determine the perceived difficulty level. For the statistical analysis Pearson’s correlation was used to determine the correlations between 50- m and100-m freestyle swimming time and swimming times obtained at the end of RST (IS, TS, PD). Significant relationships were found between the 50-m and 100-m swimming performance (p<0.01). Significant correlations were found between the IS and the TS and the 50-m swim results (p<0.01) and also the 100-m swim results (p<0.05). Significant correlations were found between the 50-m lactate values and 100-m lactate values (p<0.05). Significant relationships were found between 10x15-m RST lactate values and 50-m lactate values (p<0.05). Moreover, strong relations were found between the 10x15-m RST lactate values and 100-m lactate values (p<0.01). In conclusion, this study has shown that repeated sprint ability as well as higher anaerobic capability as reflected by the short distance. Keywords: swimming, repeated sprint ability, short distance swimming performance

The Relationship Between Repeated Sprint Performances and 50m and 100m Swimming Degrees of Swimmers

2021 ◽  
Vol 15 (10) ◽  
pp. 2911-2914
Author(s):  
Ayşegül Yapici Öksüzoğlu ◽  
Engin Güneş Atabaş
Keyword(s):  
Short Distance ◽  
Swimming Performance ◽  
Difficulty Level ◽  
Swimming Time ◽  
Sprint Time ◽  
Repeated Sprint Ability ◽  
Significant Relationships ◽  
Repeated Sprint ◽  
The Relationship ◽  
Sprint Ability

Aim: The aim of this study is to investigate the relationship between short distance swimming performance and repeated sprint ability in swimmers. Methods: 12 male swimmers between the ages of 14-18 from Denizli Pamukkale University Swimming Sports Club Performance team voluntarily participated at this study. Freestyle swimming time of the subjects was measured by using Casio stopwatch. 10x15-m, 50-m and 100-m freestyle swimming degrees of swimmers were recorded. The ideal sprint time (IS), the total sprint time (TS) and the performance decrement (PD) were determined after repeated sprint test (RST). Lactate levels were recorded at the end of each test. The Borg scale was used to determine the perceived difficulty level. For the statistical analysis Pearson’s correlation was used to determine the correlations between 50- m and100-m freestyle swimming time and swimming times obtained at the end of RST (IS, TS, PD). Results: Significant relationships were found between the 50-m and 100-m swimming performance (p<0.01). Significant correlations were found between the IS and the TS and the 50-m swim results (p<0.01) and also the 100-m swim results (p<0.05). Significant correlations were found between the 50-m lactate values and 100-m lactate values (p<0.05). Significant relationships were found between 10x15-m RST lactate values and 50-m lactate values (p<0.05). Moreover, strong relations were found between the 10x15-m RST lactate values and 100-m lactate values (p<0.01). Conclusion: This study has shown that repeated sprint ability as well as higher anaerobic capability as reflected by the short distance. Keywords: swimming, repeated sprint ability, short distance swimming performance

scholarly journals Repeated Sprint Ability in Football Players at Different Levels of Competition / Sposobnost ponavljanja sprinta kod fudbalera različitog nivoa takmičenja

2020 ◽  
Vol 18 (2) ◽  
Author(s):  
Željko Sekulić ◽  
Nikola Ilić ◽  
Dražen Dragosavljević
Keyword(s):  
Football Players ◽  
Sprint Time ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Division 1 ◽  
Sprint Repetition ◽  
The Times ◽  
Different Levels ◽  
Sprint Ability

This research was conducted to identify differences in repeated sprint ability between football players at different levels of competition and to confirm the role of this ability as a predictor of elite performance in modern football. The study involved 30 football players from two ranks of competition (15 football players from the first rank of the competition and 15 football players from the third rank of the competition). The RSA test consisted of 6 sprints at a distance of 30 meters with an active rest between two sprints of 20 seconds. Total sprint time and average sprint time were calculated for all subjects in both groups. In addition to the total and average sprint time, a percentage decline in sprint performance was calculated. The results of the study showed a significant decline in the performance of sprint repetition in both groups of subjects. The sprint speed of all six reps was significantly higher for Division 1 football players, as shown by the times gained at a distance of 30 meters. In addition, Division 1 football players had a statistically better total and average sprint time compared to Division 3 players (p <0.01). The only performance parameter in which the players of different competition rank did not differ was the percentage decline in performance (p> 0.05). The conclusion is that professional football players have a better developed ability to repeat sprints than amateurs, which confirms the previously proven role of this ability in modern football.

Klein with Lacan: A Study on the Reception of Lacanian Ideas in Uruguay and Its Effects on Clinical Practices (1955–82)

2020 ◽  
Vol 22 (3) ◽  
pp. 341-361
Author(s):  
Gonzalo Grau-Pérez ◽  
J. Guillermo Milán
Keyword(s):  
Clinical Practice ◽  
Clinical Material ◽  
Clinical Practices ◽  
Before And After ◽  
The Difference ◽  
The 1960S ◽  
The Relationship ◽  
Discursive Approach ◽  
The Way ◽  
Clinical Cases

In Uruguay, Lacanian ideas arrived in the 1960s, into a context of Kleinian hegemony. Adopting a discursive approach, this study researched the initial reception of these ideas and its effects on clinical practices. We gathered a corpus of discursive data from clinical cases and theoretical-doctrinal articles (from the 1960s, 1970s and 1980s). In order to examine the effects of Lacanian ideas, we analysed the difference in the way of interpreting the clinical material before and after Lacan's reception. The results of this research illuminate some epistemological problems of psychoanalysis, especially the relationship between theory and clinical practice.

scholarly journals Relationship between Repeated Sprint Ability and Aerobic Capacity in Professional Soccer Players

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Rhys M. Jones ◽  
Christian C. Cook ◽  
Liam P. Kilduff ◽  
Zoran Milanović ◽  
Nic James ◽  
...  
Keyword(s):  
Aerobic Capacity ◽  
Significant Negative Correlation ◽  
Soccer Players ◽  
Active Recovery ◽  
Maximal Aerobic Capacity ◽  
Sprint Time ◽  
Repeated Sprint Ability ◽  
Professional Soccer ◽  
Repeated Sprint ◽  
Sprint Ability

Aim. The aim of the present study was to investigate the relationship between maximal aerobic capacity () and repeated sprint ability (RSA) in a group of professional soccer players.Methods. Forty-one professional soccer players (age  yrs, height  cm, weight  kg) were required to perform tests to assess RSA and on two separate days with at least 48 hr rest between testing sessions. Each player performed a treadmill test to determine their and a test for RSA involving the players completing  m sprints (turn after 20 m) with 20 s active recovery between each sprint.Results. There was a significant negative correlation between body mass normalised and mean sprint time () (; ) and total sprint time () (, ).Conclusion. Results of the current study indicate that is one important factor aiding soccer players in the recovery from repeated sprint type activities.

scholarly journals Medial rotation deformity of the hip in cerebral palsy: Surgical treatment by transposition of gluteal muscles

2005 ◽  
Vol 133 (1-2) ◽  
pp. 36-40 ◽  
Author(s):  
Goran Cobeljic ◽  
Zoran Bajin ◽  
Zoran Vukasinovic ◽  
Aleksandar Lesic ◽  
Momirka Vukicevic
Keyword(s):  
Cerebral Palsy ◽  
Femoral Neck ◽  
External Rotation ◽  
Gluteus Medius ◽  
Flexion Contracture ◽  
Femoral Neck Anteversion ◽  
Before And After ◽  
Medial Rotation ◽  
Lateral Rotation ◽  
The Difference

INTRODUCTION Medial rotation deformity of the hip is a problem to patients who are handicapped by cerebral palsy but able to walk, because the knees point inward during gait (?kissing patellae") and cause falls and frequent injuries. Knees and ankles are subject to stress and, therefore, they assume compensating positions. Lower legs assume position of valgus and external rotation, whereas feet rotate either inwards or outwards. Secondary deformities make gait more difficult and cause rapid tear of footwear. AIM The purpose of the paper was to retrospectively analyze the effects of transposition of the gluteus medius and minimus muscles, a procedure introduced for the first time in our country in order to correct the deformity. A new method of binding the muscles by wire was described. There had been no previous experience with this method. METHOD This operation was indicated in patients with spastic form of cerebral palsy, who were able to walk, who had difficulties in gait and whose lateral rotation was less than 10? along with the medial rotation of over 70? of the hip on the side of the deformity. Additional prerequisite for the operation was the absence of flexion contracture of more than 15? of either the hip or the knee on the side of deformity, as there is possibility of aggravation of the flexion hip deformity due to transposed gluteal muscles (now in front of the hip joint). Fifteen hips of 10 patients were operated on. Five patients were operated on bilaterally at one time. The average age was 8 (6-12) years. The majority of patients, 8 (80%) were aged between 6 and 8. The average follow-up was 5 years (3-8). The assessment of the results was based on the comparison of rotational abilities of both hips before and after the operation (in unilateral and bilateral deformities), as well as on individual complaints before and after the operation. In patients with unilateral deformity, their ?healthy" hips were the control hips. The analysis of the femoral neck anteversion before and after operation was performed. RESULTS Average values of medial and lateral rotation of the deformed hips before operation exhibited significant statistical difference when compared to control hips. The difference of average values of rotatory movements of control and operated hips was not statistically significant after operation. The difference of average preoperative values of the femoral neck anteversion in hips with deformity was statistically significant (49.40?4.63? compared to 32.8?3.1G). Postoperative average values of anteversion in operated and control hips were not statistically significant. The difference between average preoperative (49.40?4.63?) and postoperative (35.80?7.66?) values of the femoral neck anteversion was statistically significant. Excellent results were achieved in 5 (50%) patients, i.e. 8 (53.3%) hips; good results were achieved in 3 (30%) patients, i.e. 5 (33.3%) hips; poor result in 2 (20%) patients, i.e. 2 (13.3%) hips. All 5 patients who had undergone surgery of both hips had symmetric outcome. Three patients had excellent results, while two had good results. Patients with excellent and good results (80% of patients, 86.6% of hips) showed neither weakening of the operated hip abduction nor pelvic instability (positive Trendelenburgh hip test). No complications were recorded postoperatively. CONCLUSION Transposition of gluteal muscles can be recommended in patients under 10 years of age as there is still a chance for their femoral neck to change orientation, to decrease the anteversion and thus to achieve long-lasting effect. Fixation of transposed muscles by wire proved to be effective.

scholarly journals Repeated sprint ability (RSA) performance is not related to body height and body weight measurements among perak sukma 2018 male rugby players

2019 ◽  
Vol 10 (SPL1) ◽  
Author(s):  
Nor Fazila Abd Malek ◽  
Nur Ikhwan Mohamad ◽  
Mohansundar Sankaravel2 ◽  
Sakinah Mohd Hassan
Keyword(s):  
Body Weight ◽  
Pearson Correlation ◽  
Body Height ◽  
Anthropometric Measures ◽  
Actual Performance ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
The Relationship ◽  
Rugby Players ◽  
Sprint Ability

Repeated sprint ability (RSA) is typically used for speed-endurance and agility-endurance training and assessment. RSA is preferred as it mimics actual performance during competition. RSA test involves straight sprint and quick turning movements. Thus, the aim of this study is to determine the relationship between height and body weight measurements on RSA performance, as height and weight may influence the mechanical properties of it. Ten male rugby players (body weight 72.99 ± 14.29 kg, height 169 ± 5.55 cm) selected for Perak SUKMA 2018 team were assessed during centralized training ~9 months prior to their competition.  Body weight and height were measured using standard laboratory weight and height scales prior to the RSA test. RSA were hand-timed for 5 repetitions x 2 sets x 60 seconds rest in between repetitions x 5 minutes rest in-between set. The sprints were performed in the evenings, on grass surface with participants wearing full playing attire. Standardized pre-game warm-up and cooling down were performed. Data recorded was analyzed statistically using a t-test comparison for set one versus set two performances. Pearson correlation coefficient was used to analyze the relationship between anthropometric measures and the RSA test. RSA performance has a negative correlation with the athletes’ height (r= -0.233 set 1, r = -0.435 set 2) and body weight (r= -0.556 set 1, r= -0.629 set 2). RSA performance was significantly different between set 1 and set 2 (p=0.001), with set 1 performance better than set 2. Body height and body weight did not influence RSA performance. Athletes involved did not have adequate speed-agility-endurance needed. In practical, selecting athletes based on their body height and body weight with the assumption that taller and heavier athletes may perform better may not be suitable for this kind of sport. On the other hand, using RSA to test and develop the speed-agility-endurance ability for rugby players is suggested.  

Assessment of treatment outcomes in hyperthyroid cats treated with an orally administered fixed dose of radioiodine

2019 ◽  
Vol 22 (8) ◽  
pp. 744-752 ◽  
Author(s):  
Lucia Yu ◽  
Lauren Lacorcia ◽  
Sue Finch ◽  
Thurid Johnstone
Keyword(s):  
Treatment Outcomes ◽  
Retrospective Cohort ◽  
Reference Interval ◽  
Fixed Dose ◽  
Clinicopathological Parameters ◽  
Upper Limit ◽  
Before And After ◽  
Total Thyroxine ◽  
The Difference ◽  
The Relationship

Objectives The aims of this study were to describe the treatment outcomes following oral administration of a fixed dose (138 MBq; 3.7 mCi) of radioiodine in hyperthyroid cats and to examine the correlation between total thyroxine (TT4) concentrations before and after treatment. Methods This was a retrospective cohort study that documented the TT4 concentration and clinicopathological parameters at the time of diagnosis and after treatment. Logistic regression was used to assess the relationship between TT4 concentrations before and after treatment. The difference in pre- and post-treatment variables between cats that had TT4 concentrations below or within the reference interval (RI) was compared by the Mann–Whitney U-test. Results Of 161 cats, 133 (82.6%) cats had TT4 concentrations within the RI, four (2.5%) cats had TT4 concentrations above the RI and 24 (14.9%) cats had TT4 concentrations below the RI after treatment. The severity of hyperthyroidism at diagnosis, as measured by the percentage of TT4 elevation above the upper limit of the RI, had no impact on the odds of cats having low TT4 concentrations after treatment (odds ratio 1.00; 95% confidence interval 0.96–1.05; P = 0.828). Conclusions and relevance When using an orally administered fixed dose of radioiodine for the treatment of feline hyperthyroidism, TT4 concentrations at diagnosis cannot be used to predict TT4 concentrations after treatment. The proportion of cats with TT4 concentrations below the lower limit of the RI after treatment was 14.9%. Further work is required to optimise oral radioiodine dosing to achieve maximal euthyroid outcomes.

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