When combined with physical therapy, hyaluronic acid injection can accelerate recovery by 12 days, compared with physical therapy alone.10 Hyaluronic acid injection is more effective and less painful than shockwave therapy.11 Hyaluronic acid injection is suitable for all tendinopathies but has been proven to be particularly effective for rotator cuff (shoulder) tendinopathy,10 Achilles tendinopathy,11 and tennis elbow.11