RECOVERY OF TRANSVERSE STRAIN IN HIGH–STRESS TENDONS FOLLOWING EXERCISE
Background This study evaluated the time course of recovery of transverse strain in the Achilles and patellar tendons following a bout of resistance exercise. Methods Seventeen healthy adults underwent sonographic examination of the right patellar (n=9) or Achilles (n=8) tendons immediately prior to...
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| Veröffentlicht in: | British journal of sports medicine 2013-07, Vol.47 (10), p.e3-e3 |
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| description | Background This study evaluated the time course of recovery of transverse strain in the Achilles and patellar tendons following a bout of resistance exercise. Methods Seventeen healthy adults underwent sonographic examination of the right patellar (n=9) or Achilles (n=8) tendons immediately prior to and following 90 repetitions of weight–bearing exercise. Quadriceps and gastrocnemius exercise were performed against an effective resistance of 175% and 250% body weight, respectively. Sagittal tendon thickness was determined 20 mm from the tendon enthesis and transverse strain was repeatedly monitored over a 24 hour recovery period. Results Resistance exercise resulted in an immediate decrease in Achilles (t7=10.6, P |
| doi_str_mv | 10.1136/bjsports-2013-092558.47 |
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Methods Seventeen healthy adults underwent sonographic examination of the right patellar (n=9) or Achilles (n=8) tendons immediately prior to and following 90 repetitions of weight–bearing exercise. Quadriceps and gastrocnemius exercise were performed against an effective resistance of 175% and 250% body weight, respectively. Sagittal tendon thickness was determined 20 mm from the tendon enthesis and transverse strain was repeatedly monitored over a 24 hour recovery period. Results Resistance exercise resulted in an immediate decrease in Achilles (t7=10.6, P<.01) and patellar (t8=8.9, P<.01) tendon thickness, resulting in an average transverse strain of 0.14±0.04 and 0.18±0.05. While the average strain was not significantly different between tendons, older age was associated with a reduced transverse strain response (r=0.63, P<.01). Recovery of transverse strain, in contrast, was prolonged compared with the duration of loading and exponential in nature. The mean primary recovery time was not significantly different between Achilles (6.5±3.2 hours) and patellar (7.1±3.2 hours) tendons and body weight accounted for 62% and 64% of the variation in recovery time, respectively. Discussion Despite structural and biochemical differences between the Achilles and patellar tendons,1 the mechanisms underlying transverse creep–recovery in vivo appear similar and are highly time dependent. Primary recovery required about 7 hours in healthy tendons, with full recovery requiring up to 24 hours. These in vivo recovery times are similar to those reported for axial creep recovery of the vertebral disc in vitro,2 and may be used clinically to guide physical activity to rest ratios in healthy adults. Optimal ratios for high–stress tendons in clinical populations, however, remain unknown and require further attention in light of the knowledge gained in this study.</description><identifier>ISSN: 0306-3674</identifier><identifier>EISSN: 1473-0480</identifier><identifier>DOI: 10.1136/bjsports-2013-092558.47</identifier><language>eng</language><publisher>London: BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine</publisher><subject>Adults ; Exercise ; Human performance ; Tendons ; Weight</subject><ispartof>British journal of sports medicine, 2013-07, Vol.47 (10), p.e3-e3</ispartof><rights>Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions</rights><rights>Copyright BMJ Publishing Group Jul 2013</rights><rights>Copyright: 2013 Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-b2189-416d3f55b99c96e0a75e76691d8510c6382c0ce11dfa748789e2da53a5d6fdcc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttp://bjsm.bmj.com/content/47/10/e3.42.full.pdf$$EPDF$$P50$$Gbmj$$H</linktopdf><linktohtml>$$Uhttp://bjsm.bmj.com/content/47/10/e3.42.full$$EHTML$$P50$$Gbmj$$H</linktohtml><link.rule.ids>114,115,314,780,784,3195,23570,27923,27924,77471,77502</link.rule.ids></links><search><creatorcontrib>Wearing, Scott</creatorcontrib><creatorcontrib>Locke, Simon</creatorcontrib><creatorcontrib>Cook, Jill</creatorcontrib><creatorcontrib>Purdam, Craig</creatorcontrib><creatorcontrib>Smeathers, James</creatorcontrib><creatorcontrib>Hooper, Sue</creatorcontrib><title>RECOVERY OF TRANSVERSE STRAIN IN HIGH–STRESS TENDONS FOLLOWING EXERCISE</title><title>British journal of sports medicine</title><addtitle>Br J Sports Med</addtitle><description>Background This study evaluated the time course of recovery of transverse strain in the Achilles and patellar tendons following a bout of resistance exercise. Methods Seventeen healthy adults underwent sonographic examination of the right patellar (n=9) or Achilles (n=8) tendons immediately prior to and following 90 repetitions of weight–bearing exercise. Quadriceps and gastrocnemius exercise were performed against an effective resistance of 175% and 250% body weight, respectively. Sagittal tendon thickness was determined 20 mm from the tendon enthesis and transverse strain was repeatedly monitored over a 24 hour recovery period. Results Resistance exercise resulted in an immediate decrease in Achilles (t7=10.6, P<.01) and patellar (t8=8.9, P<.01) tendon thickness, resulting in an average transverse strain of 0.14±0.04 and 0.18±0.05. While the average strain was not significantly different between tendons, older age was associated with a reduced transverse strain response (r=0.63, P<.01). Recovery of transverse strain, in contrast, was prolonged compared with the duration of loading and exponential in nature. The mean primary recovery time was not significantly different between Achilles (6.5±3.2 hours) and patellar (7.1±3.2 hours) tendons and body weight accounted for 62% and 64% of the variation in recovery time, respectively. Discussion Despite structural and biochemical differences between the Achilles and patellar tendons,1 the mechanisms underlying transverse creep–recovery in vivo appear similar and are highly time dependent. Primary recovery required about 7 hours in healthy tendons, with full recovery requiring up to 24 hours. These in vivo recovery times are similar to those reported for axial creep recovery of the vertebral disc in vitro,2 and may be used clinically to guide physical activity to rest ratios in healthy adults. Optimal ratios for high–stress tendons in clinical populations, however, remain unknown and require further attention in light of the knowledge gained in this study.</description><subject>Adults</subject><subject>Exercise</subject><subject>Human performance</subject><subject>Tendons</subject><subject>Weight</subject><issn>0306-3674</issn><issn>1473-0480</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqNkctq4zAUhkXpQNNMn6GGbrpxqiNZt2VxlcSDsSFObyvh2DIkTerUSqDd9R36hn2SquOZLmYxFATSOXznP4IPoVPAIwDKLxYrt227nQsJBhpiRRiTo0gcoAFEwjciiQ_RAFPMQ8pFdISOnVthDIRhOUDJTMf5jZ7dB_k4mM8us8IXhQ4K_06ywJ9pMpm-v775hi6KYK6zqzwrgnGepvltkk0CfadncVLon-hHU66dPflzD9H1WM_jaZjmkyS-TMMFAanCCHhNG8YWSlWKW1wKZgXnCmrJAFecSlLhygLUTSkiKaSypC4ZLVnNm7qq6BCd97nbrn3aW7czm6Wr7HpdPtp27wxQpRRwSpVHz_5BV-2-e_S_MyCEooxyz_2PolwSAep3luipqmud62xjtt1yU3YvBrD5FGH-ijCfIkwvwngFQxT2k0u3s89fY2X3YLiggpnsJjbjgv5K57fEMM-Tnl9sVt9e8gHZeJZM</recordid><startdate>201307</startdate><enddate>201307</enddate><creator>Wearing, Scott</creator><creator>Locke, Simon</creator><creator>Cook, Jill</creator><creator>Purdam, Craig</creator><creator>Smeathers, James</creator><creator>Hooper, Sue</creator><general>BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine</general><general>BMJ Publishing Group</general><general>BMJ Publishing Group LTD</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TS</scope><scope>3V.</scope><scope>7RV</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>88I</scope><scope>8AF</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BTHHO</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB0</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M2P</scope><scope>MBDVC</scope><scope>NAPCQ</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope></search><sort><creationdate>201307</creationdate><title>RECOVERY OF TRANSVERSE STRAIN IN HIGH–STRESS TENDONS FOLLOWING EXERCISE</title><author>Wearing, Scott ; Locke, Simon ; Cook, Jill ; Purdam, Craig ; Smeathers, James ; Hooper, Sue</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-b2189-416d3f55b99c96e0a75e76691d8510c6382c0ce11dfa748789e2da53a5d6fdcc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Adults</topic><topic>Exercise</topic><topic>Human performance</topic><topic>Tendons</topic><topic>Weight</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wearing, Scott</creatorcontrib><creatorcontrib>Locke, Simon</creatorcontrib><creatorcontrib>Cook, Jill</creatorcontrib><creatorcontrib>Purdam, Craig</creatorcontrib><creatorcontrib>Smeathers, James</creatorcontrib><creatorcontrib>Hooper, Sue</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Physical Education Index</collection><collection>ProQuest Central (Corporate)</collection><collection>Nursing & Allied Health Database</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>BMJ Journals</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Research Library (Corporate)</collection><collection>Nursing & Allied Health Premium</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><jtitle>British journal of sports medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wearing, Scott</au><au>Locke, Simon</au><au>Cook, Jill</au><au>Purdam, Craig</au><au>Smeathers, James</au><au>Hooper, Sue</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>RECOVERY OF TRANSVERSE STRAIN IN HIGH–STRESS TENDONS FOLLOWING EXERCISE</atitle><jtitle>British journal of sports medicine</jtitle><addtitle>Br J Sports Med</addtitle><date>2013-07</date><risdate>2013</risdate><volume>47</volume><issue>10</issue><spage>e3</spage><epage>e3</epage><pages>e3-e3</pages><issn>0306-3674</issn><eissn>1473-0480</eissn><abstract>Background This study evaluated the time course of recovery of transverse strain in the Achilles and patellar tendons following a bout of resistance exercise. Methods Seventeen healthy adults underwent sonographic examination of the right patellar (n=9) or Achilles (n=8) tendons immediately prior to and following 90 repetitions of weight–bearing exercise. Quadriceps and gastrocnemius exercise were performed against an effective resistance of 175% and 250% body weight, respectively. Sagittal tendon thickness was determined 20 mm from the tendon enthesis and transverse strain was repeatedly monitored over a 24 hour recovery period. Results Resistance exercise resulted in an immediate decrease in Achilles (t7=10.6, P<.01) and patellar (t8=8.9, P<.01) tendon thickness, resulting in an average transverse strain of 0.14±0.04 and 0.18±0.05. While the average strain was not significantly different between tendons, older age was associated with a reduced transverse strain response (r=0.63, P<.01). Recovery of transverse strain, in contrast, was prolonged compared with the duration of loading and exponential in nature. The mean primary recovery time was not significantly different between Achilles (6.5±3.2 hours) and patellar (7.1±3.2 hours) tendons and body weight accounted for 62% and 64% of the variation in recovery time, respectively. Discussion Despite structural and biochemical differences between the Achilles and patellar tendons,1 the mechanisms underlying transverse creep–recovery in vivo appear similar and are highly time dependent. Primary recovery required about 7 hours in healthy tendons, with full recovery requiring up to 24 hours. These in vivo recovery times are similar to those reported for axial creep recovery of the vertebral disc in vitro,2 and may be used clinically to guide physical activity to rest ratios in healthy adults. Optimal ratios for high–stress tendons in clinical populations, however, remain unknown and require further attention in light of the knowledge gained in this study.</abstract><cop>London</cop><pub>BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine</pub><doi>10.1136/bjsports-2013-092558.47</doi></addata></record> |
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| title | RECOVERY OF TRANSVERSE STRAIN IN HIGH–STRESS TENDONS FOLLOWING EXERCISE |
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