Some papers discussing tendinitis and tendinosis.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1122566/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3445129/
The second paper has more detail and discusses some treatments including eccentric exercises. The Flexibar exercise, as recommended for TE, appears to be an eccentric exercise, I believe.