There are multiple definitions:

1. quadriceps tendon(English)

   • QT-A, ACL, ACLR, BPTB, HQ, HT, IKDC, LQ, STG, MPFL, ATT, BQT
   • Musculoskeletal system, Myocyte / muscle, Sports medicine, Surgery, Orthopedics
   • https://doi.org…363546518825340
   • https://doi.org…nee.2021.09.007
   • https://doi.org…634-023-00601-3

2. Qi-therapy(English)

   • stabilizes the sympathovagal function more than placebo therapy
   • HF, HR, HRV, LF
   • Alternative medicine, Nervous activity - (para)sympathetic, Variability / oscillation
   • https://doi.org…207450590934543