02/17/2026
This is such important information….ESPECIALLY IF YOU HAVE A -CANCER DIAGNOSIS!
ReformUPilates Training By Appointment Only
Latissimus Dorsi & Gluteus Maximus — The Power Engines of the Posterior Chain
This image highlights two of the most powerful muscles in the human body — the latissimus dorsi and the gluteus maximus. Though located in different regions (upper back and hip), they are functionally connected through the posterior chain and play a major role in strength, posture, and whole-body movement efficiency.
The latissimus dorsi is a broad, flat muscle covering the lower half of the back. It originates from the thoracic spine, thoracolumbar fascia, iliac crest, and lower ribs, and inserts into the humerus. Functionally, it produces shoulder extension, adduction, and internal rotation. It is heavily involved in pulling movements like rows, pull-downs, climbing, swimming, and lifting tasks. It also contributes to trunk stability through its fascial connections.
The gluteus maximus is the largest and strongest hip extensor muscle. It originates from the posterior pelvis and sacrum and inserts into the iliotibial band and femur. Its primary actions are hip extension and external rotation. This muscle is crucial for rising from sitting, climbing stairs, sprinting, jumping, and controlling forward trunk movement. It is a key driver of lower-body power.
💥 Functional connection — the posterior chain:
Through the thoracolumbar fascia, the latissimus dorsi and gluteus maximus are biomechanically linked (often called the posterior oblique sling). During activities like walking, running, and lifting, opposite-side lat and glute work together to transfer force across the trunk. This cross-body linkage improves rotational control and load transfer.
⚠️ Clinical & training relevance:
Weak glutes and underactive lats can lead to poor load distribution, low back strain, and reduced athletic performance. Smart training should include hip extension work (bridges, hip thrusts, deadlifts) and pulling work (rows, pull-downs) to strengthen this global support system.
