There are multiple definitions:

1. limb symmetry index(English)

   • calculated for each landing variable using: [(involved/uninvolved) × 100%. Between ACLR and contralateral limb, where LSI= [ACLR/contralateral]*100]
   • SHT, TT, Q-LSI, ACLR, IKDC, RTS, ACL, ASYM, KOOS, SL, GRF, KEM, KSES, TSK, TSK-11, vGRF
   • Physiology, Musculoskeletal system, Exercise & Training, Sports medicine, Ratio-based metric, Knee, Gait/walking
   • https://doi.org…hys.2022.874632
   • https://doi.org…363546515591258
   • https://doi.org…363546517708996

2. left stability index(English)

   • refers to stability under open-eye biped standing conditions
   • PSI, SI
   • Musculoskeletal system, Gait/walking
   • https://doi.org…55/2022/8867724

3. long standing infection(English)

   • AI, RITA
   • Infection, Microbiology
   • https://doi.org…imc.2014.04.014

4. Learning Style Inventory(English)

   • MSN, PBL
   • Education, Guidelines
   • https://doi.org…urs.2007.01.018