The time course of in vivo recovery of transverse strain in high-stress tendons following exercise

Wearing, Scott; Smeathers, James; Hooper, Sue; Locke, Simon; Purdam, Craig; Cook, Jillianne Leigh

doi:10.1136/bjsports-2012-091707

Cited by 18 publications

(21 citation statements)

References 69 publications

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“… 22 Studies of the acute response of normal tendons to exercise have described a multitude of physiological processes including changes in vascularity, 23 genetic expression 24 and mechanical properties. 25 Our results extend those of a number of studies of lower limb tendons, where pathological tendons exhibit an altered loading response compared with healthy tendon. People with Achilles tendinopathy have been found to have an altered response to loading, either in the form of a smaller initial reduction in tendon thickness (5% reduction vs 21% reduction in thickness in controls) and a slower return to normal tendon dimensions in response to eccentric exercise 5 or as an increase in tendon thickness after concentric and eccentric exercise.…”

Section: Discussionsupporting

confidence: 88%

Increased supraspinatus tendon thickness following fatigue loading in rotator cuff tendinopathy: potential implications for exercise therapy

McCreesh

Purtill

Donnelly

et al. 2017

BMJ Open Sport Exerc Med

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Background/aimExercise imparts a load on tendon tissue that leads to changes in tendon properties. Studies suggest that loading immediately reduces tendon thickness, with a loss of this response in symptomatic tendinopathy. No studies investigating the response of tendon dimensions to load for the rotator cuff tendons exist. This study aimed to examine the short-term effect of loading on the thickness of the supraspinatus tendon and acromiohumeral distance those with and without rotator cuff tendinopathy.MethodsParticipants were 20 painfree controls, and 23 people with painful rotator cuff tendinopathy. Supraspinatus tendon thickness and acromiohumeral distance were measured using ultrasound scans before, and at three time points after loading (1, 6 and 24 hours). Loading involved isokinetic eccentric and concentric external rotation and abduction.ResultsThere was a significant increase in supraspinatus tendon thickness in the pain group at 1 (7%, ∆=0.38, 95% CI 0.19 to 0.57) and 6 hours (11%, ∆=0.53, 95% CI 0.34 to 0.71), although only the 6 hours difference exceeded minimal detectable difference. In contrast, there was a small non-significant reduction in thickness in controls. The acromiohumeral distance reduced significantly in both groups at 1 hour (controls: ∆=0.64, 95% CI 0.38 to 0.90; pain: ∆=1.1, 95% CI 0.85 to 1.33), with a larger change from baseline in the pain group.ConclusionThose diagnosed with painful supraspinatus tendinopathy demonstrated increased thickening with delayed return to baseline following loading. Rehabilitation professionals may need to take into account the impact of loading to fatigue when planning rehabilitation programmes.

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Section: Discussionsupporting

confidence: 88%

Increased supraspinatus tendon thickness following fatigue loading in rotator cuff tendinopathy: potential implications for exercise therapy

McCreesh

Purtill

Donnelly

et al. 2017

BMJ Open Sport Exerc Med

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“…In contrast, rope skipping represents in this context a more monotonous ankle‐straining activity. The examined healthy individuals did not show any signs of intratendinous edema or hyperemia, but these results are, at least in part, controversially discussed in literature as well . Both the reduction of tendon volume and increase in OSR after exercise might indicate a loss of free water within the tendon.…”

Section: Discussionmentioning

confidence: 80%

Short‐term exercise‐induced changes in hydration state of healthy achilles tendons can be visualized by effects of off‐resonant radiofrequency saturation in a three‐dimensional ultrashort echo time MRI sequence applied at 3 tesla

Syha

Springer

Grözinger

et al. 2013

Magnetic Resonance Imaging

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“…Most scans were performed after the first match of the day. Although previous studies have shown an immediate decrease in anterior‐posterior tendon diameter immediately post‐exercise (Wearing et al., ), mechanical loading seems to take some time to exert effect on the structure of the tendon detected by UTC. A review on the response of a tendon to loading proposed that the metabolic response peaks only 24 h after mechanical loading (Magnusson et al., ) In addition, no changes in echo types were found 1 day after an Australian football game, while there was a change in structure 2 days after a game (Rosengarten et al., ).…”

Section: Discussionmentioning

confidence: 81%

Does the adolescent patellar tendon respond to 5 days of cumulative load during a volleyball tournament?

Ark

Docking

Akker‐Scheek

et al. 2015

Scandinavian Med Sci Sports

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Patellar tendinopathy (jumper's knee) has a high prevalence in jumping athletes. Excessive load on the patellar tendon through high volumes of training and competition is an important risk factor. Structural changes in the tendon are related to a higher risk of developing patellar tendinopathy. The critical tendon load that affects tendon structure is unknown. The aim of this study was to investigate patellar tendon structure on each day of a 5-day volleyball tournament in an adolescent population (16-18 years). The right patellar tendon of 41 players in the Australian Volleyball Schools Cup was scanned with ultrasound tissue characterization (UTC) on every day of the tournament (Monday to Friday). UTC can quantify structure of a tendon into four echo types based on the stability of the echo pattern. Generalized estimating equations (GEE) were used to test for change of echo type I and II over the tournament days. Participants played between eight and nine matches during the tournament. GEE analysis showed no significant change of echo type percentages of echo type I (Wald chi-square = 4.603, d.f. = 4, P = 0.331) and echo type II (Wald chi-square = 6.070, d.f. = 4, P = 0.194) over time. This study shows that patellar tendon structure of 16-18-year-old volleyball players is not affected during 5 days of cumulative loading during a volleyball tournament.

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The time course of in vivo recovery of transverse strain in high-stress tendons following exercise

Cited by 18 publications

References 69 publications

Increased supraspinatus tendon thickness following fatigue loading in rotator cuff tendinopathy: potential implications for exercise therapy

Increased supraspinatus tendon thickness following fatigue loading in rotator cuff tendinopathy: potential implications for exercise therapy

Short‐term exercise‐induced changes in hydration state of healthy achilles tendons can be visualized by effects of off‐resonant radiofrequency saturation in a three‐dimensional ultrashort echo time MRI sequence applied at 3 tesla

Does the adolescent patellar tendon respond to 5 days of cumulative load during a volleyball tournament?

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