Abstract:
BACKGROUND:Few interventions reduce patellar tendinopathy (PT) pain in the short term. Eccentric exercises are painful and have limited effectiveness during the competitive season. Isometric and isotonic muscle contractions may have an immediate effect on PT pain. METHODS:This single-blinded, randomised cross-over study compared immediate and 45 min effects following a bout of isometric and isotonic muscle contractions. Outcome measures were PT pain during the single-leg decline squat (SLDS, 0-10), quadriceps strength on maximal voluntary isometric contraction (MVIC), and measures of corticospinal excitability and inhibition. Data were analysed using a split-plot in time-repeated measures analysis of variance (ANOVA). RESULTS:6 volleyball players with PT participated. Condition effects were detected with greater pain relief immediately from isometric contractions: isometric contractions reduced SLDS (mean±SD) from 7.0±2.04 to 0.17±0.41, and isotonic contractions reduced SLDS (mean±SD) from 6.33±2.80 to 3.75±3.28 (p<0.001). Isometric contractions released cortical inhibition (ratio mean±SD) from 27.53%±8.30 to 54.95%±5.47, but isotonic contractions had no significant effect on inhibition (pre 30.26±3.89, post 31.92±4.67; p=0.004). Condition by time analysis showed pain reduction was sustained at 45 min postisometric but not isotonic condition (p<0.001). The mean reduction in pain scores postisometric was 6.8/10 compared with 2.6/10 postisotonic. MVIC increased significantly following the isometric condition by 18.7±7.8%, and was significantly higher than baseline (p<0.001) and isotonic condition (p<0.001), and at 45 min (p<0.001). CONCLUSIONS:A single resistance training bout of isometric contractions reduced tendon pain immediately for at least 45 min postintervention and increased MVIC. The reduction in pain was paralleled by a reduction in cortical inhibition, providing insight into potential mechanisms. Isometric contractions can be completed without pain for people with PT. The clinical implications are that isometric muscle contractions may be used to reduce pain in people with PT without a reduction in muscle strength.
journal_name
Br J Sports Medjournal_title
British journal of sports medicineauthors
Rio E,Kidgell D,Purdam C,Gaida J,Moseley GL,Pearce AJ,Cook Jdoi
10.1136/bjsports-2014-094386subject
Has Abstractpub_date
2015-10-01 00:00:00pages
1277-83issue
19eissn
0306-3674issn
1473-0480pii
bjsports-2014-094386journal_volume
49pub_type
杂志文章,随机对照试验abstract:OBJECTIVE:Although physical activity occurs in leisure, transport, occupational and domestic domains of life, the contribution of house and garden work (HGW) to the association between total physical activity and well-being is not clear. The aim was to describe the contribution of HGW to total physical activity (TPA) i...
journal_title:British journal of sports medicine
pub_type: 杂志文章
doi:10.1136/bjsports-2012-091103
更新日期:2014-06-01 00:00:00
abstract::Most injuries sustained by rugby players affect the soft tissues, and fracture is relatively uncommon. Whereas the lower limb is most affected in footballers, the upper limb tends to be injured in rugby players. Thirty consecutive fractures and ten dislocations affecting the upper limb, sustained by 35 rugby players, ...
journal_title:British journal of sports medicine
pub_type: 杂志文章
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abstract:BACKGROUND:In all studies in which the strength of the neck extensor muscles has been measured, the level of thoracic support has been adjusted differently so direct comparison of the results is not possible. OBJECTIVE:To measure and compare the isometric force and isometric torque of neck extensor muscles at differen...
journal_title:British journal of sports medicine
pub_type: 杂志文章
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journal_title:British journal of sports medicine
pub_type: 杂志文章,meta分析,评审
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更新日期:2007-10-01 00:00:00
abstract::Preparticipation screening programmes for underlying cardiac pathologies are now commonplace for many international sporting organisations. However, providing medical clearance for an asymptomatic athlete without a family history of sudden cardiac death (SCD) is especially challenging when the athlete demonstrates par...
journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
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pub_type: 杂志文章
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pub_type: 信件
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pub_type: 共识发展会议,杂志文章
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journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
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journal_title:British journal of sports medicine
pub_type: 杂志文章,随机对照试验
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pub_type: 杂志文章,meta分析,评审
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journal_title:British journal of sports medicine
pub_type: 杂志文章,评审
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pub_type: 传,历史文章,杂志文章
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更新日期:1997-03-01 00:00:00
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更新日期:2014-01-01 00:00:00
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更新日期:2010-09-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2007-07-01 00:00:00