[ { "key": "9I5DWC2Q", "version": 3, "library": { "type": "group", "id": 428225, "name": "cafdbabygirl", "links": { "alternate": { "href": "https://www.zotero.org/groups/cafdbabygirl", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/428225/items/9I5DWC2Q", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/cafdbabygirl/items/9I5DWC2Q", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2754057, "username": "Juanmi397", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/juanmi397", "type": "text/html" } } }, "creatorSummary": "Sannicandro et al.", "parsedDate": "2014-06", "numChildren": 0 }, "data": { "key": "9I5DWC2Q", "version": 3, "itemType": "journalArticle", "title": "Balance Training Exercises Decrease Lower-Limb Strength Asymmetry in Young Tennis Players", "creators": [ { "creatorType": "author", "firstName": "Italo", "lastName": "Sannicandro" }, { "creatorType": "author", "firstName": "Giacomo", "lastName": "Cofano" }, { "creatorType": "author", "firstName": "Rosa A.", "lastName": "Rosa" }, { "creatorType": "author", "firstName": "Andrea", "lastName": "Piccinno" } ], "abstractNote": "The issue of functional asymmetries in the lower-limbs has been the subject of numerous recent investigations concerning many different contact, limited-contact and non-contact sports. The presence of strength asymmetries in the lower-limbs of young athletes practicing various sporting disciplines is considered an intrinsic risk factor for injury; in such cases, compensation strategies should thus be implemented aimed at eliminating, or at least limiting, the degree of asymmetry in order to avoid the negative consequences asymmetries can have upon the health of young sportsmen and women on the long-term. The aim of the present study was to examine the presence of functional asymmetries in the lower-limbs of young tennis players in strength and speed drill performance and to test a specific balance-training programme in its capacity to effectively reduce such asymmetries. Twenty-three young tennis players were randomly assigned to the Experimental Group (EG) (n = 11: 4 females, 7 males; 13.2 ± 0.9 years; 50.8 ± 8.9 Kg; 1.63 ± 0.08 m) or Comparison Group (CG) (n = 12: 4 females, 8 males; 13.0 ± 0.9 years; 51.1 ± 9.2 Kg; 1.61 ± 0.09 m). To quantify percent asymmetries in lower-limb strength before (T0) and following (T1) training, performances were assessed in the one-leg hop test (OLH), side-hop test (SH) and side steps and forward 4.115- m test (4m-SSF). Performances in the 10 and 20m sprint tests and the Foran test were also assessed. The EG completed a total of 12 training sessions directed at balance training: two 30- minute sessions/week over a 6-week period. The CG followed an identical training schedule, but training sessions consisted of tennis-specific drills only. The results reveal significant differences between pre- and post-training tests in the EG only: the degree of lower-limb asymmetry was decreased in the EG following completion of the training programme, as assessed using the OLH test (p < 0.001), SH test (p < 0.001) and 4m-SSF test (p < 0.05). A significant interaction and main effect of training was also observed in the EG: balance training led to a significant reduction in the percent of asymmetry in lower-limb strength, as measured using the SH (p < 0.01), 4m-SSF (p < 0.01) and OLH (p < 0.05) tests. These results confirm that balance training exercises are able to counteract/reduce the degree of asymmetry in lower-limb strength in young tennis players. ABSTRACT FROM AUTHOR", "publicationTitle": "Journal of Sports Science & Medicine", "publisher": "", "place": "", "date": "Junio 2014", "volume": "13", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "397-402", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Journal of Sports Science & Medicine", "DOI": "", "citationKey": "", "url": "http://search.ebscohost.com/login.aspx?direct=true&db=s3h&AN=96382547&site=ehost-live", "accessDate": "2015-11-10T12:15:27Z", "PMID": "", "PMCID": "", "ISSN": "13032968", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "EBSCOhost", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "*ANTHROPOMETRY", "type": 1 }, { "tag": "*BODY movement", "type": 1 }, { "tag": "*EQUILIBRIUM (Physiology)", "type": 1 }, { "tag": "*EXERCISE physiology", "type": 1 }, { "tag": "*LEG -- Physiology", "type": 1 }, { "tag": "*MUSCLE strength", "type": 1 }, { "tag": "*MUSCLE strength -- Testing", "type": 1 }, { "tag": "*PREVENTION", "type": 1 }, { "tag": "*RUNNING", "type": 1 }, { "tag": "*SPORTS sciences", "type": 1 }, { "tag": "*TENNIS", "type": 1 }, { "tag": "*TENNIS injuries", "type": 1 }, { "tag": "*THERAPEUTICS", "type": 1 }, { "tag": "ADOLESCENCE", "type": 1 }, { "tag": "ANALYSIS of variance", "type": 1 }, { "tag": "CLINICAL trials", "type": 1 }, { "tag": "CONFIDENCE intervals", "type": 1 }, { "tag": "DATA analysis -- Software", "type": 1 }, { "tag": "DESCRIPTIVE statistics", "type": 1 }, { "tag": "EFFECT sizes (Statistics)", "type": 1 }, { "tag": "ITALY", "type": 1 }, { "tag": "PRE-tests & post-tests", "type": 1 }, { "tag": "RANDOMIZED controlled trials", "type": 1 }, { "tag": "REPEATED measures design", "type": 1 }, { "tag": "SAMPLING (Statistics)", "type": 1 }, { "tag": "STATISTICAL significance", "type": 1 }, { "tag": "Strength asymmetry", "type": 1 }, { "tag": "T-test (Statistics)", "type": 1 }, { "tag": "lateral/ side movements", "type": 1 }, { "tag": "risk of injury", "type": 1 }, { "tag": "speed", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2015-11-10T12:29:29Z", "dateModified": "2015-11-10T12:29:29Z" } }, { "key": "VA9HGJFJ", "version": 3, "library": { "type": "group", "id": 428225, "name": "cafdbabygirl", "links": { "alternate": { "href": "https://www.zotero.org/groups/cafdbabygirl", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/428225/items/VA9HGJFJ", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/cafdbabygirl/items/VA9HGJFJ", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2754057, "username": "Juanmi397", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/juanmi397", "type": "text/html" } } }, "creatorSummary": "Gescheit et al.", "parsedDate": "2015-10", "numChildren": 0 }, "data": { "key": "VA9HGJFJ", "version": 3, "itemType": "journalArticle", "title": "Consecutive Days of Prolonged Tennis Match Play: Performance, Physical, and Perceptual Responses in Trained Players", "creators": [ { "creatorType": "author", "firstName": "Danielle T.", "lastName": "Gescheit" }, { "creatorType": "author", "firstName": "Stuart J.", "lastName": "Cormack" }, { "creatorType": "author", "firstName": "Machar", "lastName": "Reid" }, { "creatorType": "author", "firstName": "Rob", "lastName": "Duffield" } ], "abstractNote": "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. ABSTRACT FROM AUTHOR", "publicationTitle": "International Journal of Sports Physiology & Performance", "publisher": "", "place": "", "date": "Octubre 2015", "volume": "10", "issue": "7", "section": "", "partNumber": "", "partTitle": "", "pages": "913-920", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "International Journal of Sports Physiology & Performance", "DOI": "", "citationKey": "", "url": "http://search.ebscohost.com/login.aspx?direct=true&db=s3h&AN=110245292&site=ehost-live", "accessDate": "2015-11-10T12:15:27Z", "PMID": "", "PMCID": "", "ISSN": "15550265", "archive": "", "archiveLocation": "", "shortTitle": "Consecutive Days of Prolonged Tennis Match Play", "language": "", "libraryCatalog": "EBSCOhost", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "*ANTHROPOMETRY", "type": 1 }, { "tag": "*ATHLETIC ability", "type": 1 }, { "tag": "*CREATINE kinase", "type": 1 }, { "tag": "*EXERCISE", "type": 1 }, { "tag": "*EXERCISE physiology", "type": 1 }, { "tag": "*EXERCISE tests", "type": 1 }, { "tag": "*HEART rate monitoring", "type": 1 }, { "tag": "*JUMPING", "type": 1 }, { "tag": "*MUSCLE strength -- Testing", "type": 1 }, { "tag": "*MYALGIA", "type": 1 }, { "tag": "*PAIN measurement", "type": 1 }, { "tag": "*PERCEPTION", "type": 1 }, { "tag": "*PHYSIOLOGY", "type": 1 }, { "tag": "*RUNNING", "type": 1 }, { "tag": "*SHOULDER -- Physiology", "type": 1 }, { "tag": "*SPORTS events", "type": 1 }, { "tag": "*TENNIS", "type": 1 }, { "tag": "*THIGH", "type": 1 }, { "tag": "*WATER-electrolyte balance (Physiology)", "type": 1 }, { "tag": "ACCELEROMETRY", "type": 1 }, { "tag": "AUSTRALIA", "type": 1 }, { "tag": "CONFIDENCE intervals", "type": 1 }, { "tag": "DATA analysis -- Software", "type": 1 }, { "tag": "DESCRIPTIVE statistics", "type": 1 }, { "tag": "EFFECT sizes (Statistics)", "type": 1 }, { "tag": "EVALUATION", "type": 1 }, { "tag": "RESEARCH -- Finance", "type": 1 }, { "tag": "SCALE analysis (Psychology)", "type": 1 }, { "tag": "activity profile", "type": 1 }, { "tag": "fatigue", "type": 1 }, { "tag": "racket sports", "type": 1 }, { "tag": "racquet sports", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2015-11-10T12:29:27Z", "dateModified": "2015-11-10T12:29:27Z" } } ]