04/01/2026
From a colleague today.
Thanks Brian.
"Found this interesting Jack. The difference between "stretching" and "lengthening" the IT Band.
DELTOID OF FARABEUF
The gluteal region is compromised of the familiar gluteus maximus (red), gluteus medius, gluteus minimius and tensor fascia lata (orange). These individual muscles have been given individual actions but as we know no muscle ever works in isolation. In this vein, classical anatomists also noticed muscles were not easily separated from their neighbors due to strong fascial LINKS.
Given this, anatomists like FARABEUF gave muscle units a single name based on the shape. Since the glute max (superficial layer) and TFL both directly share fibers with the tractus iliotibialis (fascia lata, iliotibial band) they appear to be apart of the same shape. This fan of fibers resembled the deltoid of the shoulder and was labeled the Gluteal Deltoid of Farabeuf.
Taking this concept to a functional model, one could imagine the tensional pull of the glute max, superior fascial lata (purple) and the TFL dictating the position and function of the IT band.
Common syndromes of patello-femoral syndrome and other patellar dysfunctions are always affected by the gluteal complex via the IT band. Rather than target just the glute max in training or treatment, it is important to not forget the TFL’s role in the deltoid team.
The TFL is a flexor and internal rotator of the femur via its direct attachment to the greater trochanter. However, since the iliotibial tract is effectively the TFL’s distal tendon, contraction of the muscle will have an effect on tibial external rotation and patellar lateral tracking. In closed chain, the TFL will also pull the ilium anterior and lateral rotation.
Lastly, the TFL contraction causes pressurization of the vastus lateralis under the ITB which assists in lateral stability of the knee (Kaplan). Strong glutes are always important, but the whole deltoid contributes to lower body kinematics, even the smaller portions.