What are tendons made of?
Collagen tissue
What do tendons do?
Connect muscle to bone, transfer force from muscles into skeletal system, also have excellent tensile properties
What is a tendon enthesis?
Junction between a tendon and a bone, made of fibrocartilage
What is a myotendinous junction?
Connection between muscle and tendon, susceptible for injury
What is the tendon stress-strain curve for tendons?
Same as for ligaments
How do tendons adapt to training?
By increasing cross-sectional area
How long does it take for tendon strength to improve?
4-8 weeks
When do tendon structural changes occur?
Over 12 weeks
How long does it take to increase CS area of tendons?
6-12 months
What is optimal tendon loading?
Every 2-3 days
What are the 2 types of overuse tendon injuries?
Enthesopathy and tendinopathy
What are the 2 types of acute tendon injuries?
Direct trauma and rupture
What is an enthesopathy?
Injury or disorder affecting the enthesis of the tendon
What are the characteristics of an enthesopathy?
Inflammation, degeneration, or calcification of the attachment point
Also pain and dysfunction
What causes an enthesopathy?
Over use (most common), or trauma
What is the D&T for enthesopathy?
History, physical (palpation), imagine (rarely used): US, MRI
Rest, pain control, orthoses, physiotherapy
What is the return to sport for an enthesopathy?
Mild: 4-6 weeks
Moderate/severe: 3-6 months
What is a tendinopathy?
An umbrella term used for tendon problems
What are the mechanisms for tendinopathy?
Repetitive tensile, and loading: causes repetitive microtraumas
Also inadequate recovery between loadings
What is reactive tendinopathy?
Non-inflammatory, structural changes and thickening of stressed tendon area
What is tendon disrepair?
Worsening tendon pathology, tendon structure becomes disorganized
What is degenerative tendinopathy?
Chronic stage
What are 8 intrinsic risk factors for tendon injury?
Older age, male sex, menopause, genetics, systemic conditions, medications, biomechanics/technique, previous injury
What are 4 extrinsic risk factors for tendon injuries?
Training load, spikes in loads, periods of deconditioning, biomechanical change