Acute Effects of Static and Proprioceptive Neuromuscular Facilitation Stretching on Agility Performance in Elite Youth Soccer Players

Int J Exerc Sci 5(2) : 97-105, 2012. A warm-up is an important part of preparation for a soccer match. Stretching is typically part of the warm-up however, debate exists as to the most appropriate type of stretching to perform. The purpose of this study was to examine the effects of static and proprioceptive neuromuscular facilitation (PNF) stretching on soccer-specific agility performance in 14 male elite, premier league youth soccer players. Participants completed 4 trials of the Balsom agility test while dribbling a soccer ball. Height, age, and body mass were collected in trial 1 and participants were accommodated to the agility test during trials 1 and 2. Trials 3 and 4 were the static and PNF treatment trials that were administered after a standardized warm-up (control) in a randomized and counterbalanced manner. There were no significant differences between the difference scores of the static and PNF stretching conditions, P = .66. Furthermore, no significant differences were found between the control and stretching trials for static stretching, P = .15 or between the control and stretching trials for PNF stretching, P = .58. Neither mode of stretching significantly affected agility performance. More research is needed to determine the chronic effects of PNF stretching on agility performance

Relative Age Effect Among Elite Youth Female Soccer Players across the United States

The consequence of relative age eff ect (RAE) has been an overrepresentation of athletes born early in the cohort and an underrepresentation of athletes born late in the cohort. There are signifi cantly fewer studies that examine this phenomenon among female soccer players. Therefore, the purpose was to determine the existence of RAEs among elite youth female soccer players competing in the Elite Clubs National League (ECNL) during the 2012-2013 season. Player birthdates (U14-U18 N=7,294) were collected from the ECNL and compared to the birthdates distribution for the general population. Data revealed a RAE across all age groups (U14-U18) indicating a preference for the selection of the oldest in the cohort. An overrepresentation of players was observed in Q1 and an underrepresentation of players in Q4 among the U14-U17 age groups. Among the u18 age group, an overrepresentation of players was detected in Q2 and an underrepresentation of players in Q4. The birthdate distribution for the fi rst and second halves of the playing season showed strong RAEs among the U14-U17 age groups. No statistically signifi cant diff erence was found between the fi rst and second halves of the playing season among players in the U18 age group

Synthesis and characterization of 1-formyl-3-phenyl-5-aryl-2-pyrazolines

Reaction of chalcone derivatives 1-4 with hydrazine hydrate in presence of formic acid yielded 2-pyrazolines 5-8. Structures of these compounds have been elucidated by spectroscopic methods; IR, UV, 1H NMR, 13C NMR. Their purities were confirmed by elemental analyses

Synthesis and biological activity of 2-azetidinones, sulphonamides, arylamides and thiourea derivatives

696-7002-Amino-4-[2-(p-chlorobenzenesulphonamido)phenyl]thiazole 1 on condensation with aromatic aldehydes afford 2-benzalamino-4-[2-(p- chlorobenzenesulphonamido)phenyl]thiazole of the type <b style="mso-bidi-font-weight: normal">2. The latter undergoes cyclisation with chloroacetyl chloride in the presence of triethylamine furnishing 2-(4'-aryl-3'-chloro-2'-azetidinon-1'-yl)-4-[2-(<i style="mso-bidi-font-style: normal">p-chlorobenzenesulphonamido) Phenyl]thiazole <b style="mso-bidi-font-weight: normal">3. Thiazole 1 on reaction with different arylsulphonyl chlorides, substituted benzoyl chlorides and various aryl isothiocyanates gives the corresponding 2-aryl sulphonamido-4-[2-(p-chlorobenzene-sulphonamido)phenyl]thiazoles 4, 2-aroylamino-4-[2-(p-chlorobenzenesulphonamido)phenyl]thiazoles 5 and 2- substituted arylthioureidoamino-4-[2-(p-chlorobenzene-sulphonamido)phenyl]thiazoles 6. The products display moderate to good antimicrobial and tuberculostatic activities. The structures of the products 2-6 have been elucidated by elemental analyses and spectral data.</span

Integrated management of interstitial lung disease associated with rheumatoid arthritis - A case report

Interstitial lung disease (ILD) is a broad term for a large group of disorders that leads to fibrosis of the lungs. A female of 58 years with ILD associated with rheumatoid arthritis was well managed by integrated treatment of Ayurveda and physiotherapy. This is shown in our case report where in the symptoms of the patient were relieved by more than 80% by the combined approach of treatment. The patient consulted for complaints of intermittent cough and exertional dyspnea for 1 month and pain and stiffness of joints for the last 3 years. This report emphasizes the importance of integrated management of ILD associated with RA by Ayurvedic therapies such as sadhyo-virechana (instant purgative therapy) vaitarana basti (special enema with revival property) and ayurvedic oral medications with physiotherapy procedures such as postural breathing exercise, postural drainage, and deep breathing exercise. Although the disease is not completely curable, integrated approach could provide convenient and a better way of treatment which relieved the symptoms and also improved the quality of life

Autimatic tools of match analysis : inspecting soccer team's dispersion

The contracting-expanding soccer teams' relationship is one of the most important dynamic behaviors of the game. Therefore, a soccer game was analyzed using the centroid and stretch index method, while recording the team's ball possession status (with or without ball possession). The correlation test suggest an inverse relationship between opposing teams (r _(1508)=- 0.054) during all game. When considering ball possession by the teams, the results of the stretch index confirm that there are statistical differences with a small effect between the moments with and without possession of the ball for team B (F_(1; 1506)=22.777; p-value≤0.001; η^2=0.015; Power=0.998). Therefore, it was possible to confirm that the contracting -expanding relationship is an intrinsic behaviour of a soccer game in relation to ball possession.info:eu-repo/semantics/publishedVersio

Synthesis and Biological Activity of Some New Pyrazoline and Pyrrolo[3,4-c]pyrazole-4,6-dione Derivatives: Reaction of Nitrilimines with Some Dipolarophiles

Several 1,3-diaryl-5-(cyano-, aminocarbonyl- and ethoxycarbonyl-)-2-pyrazoline, pyrrolo[3,4-c]pyrazole-4,6-dione and 1,3,4,5-tetraaryl-2-pyrazoline derivativeswere prepared by the reaction of nitrilimine with different dipolarophilic reagents. The newcompounds were characterized using IR, 1H-NMR, 13C-NMR and mass spectra. Biologicalscreening of some compounds is reported