When comparing the conventional deadlift and the Romanian deadlift, the movement of the hip joint is essentially the same during the upward and downward phases at mid-thigh and knee height, even...
Mechanism
Synthesis from 1 study
The hip moves the same way in both lifts during the middle part of the movement because the muscles and bones around the pelvis hold it in a stable position, no matter how the knees or ankles bend. The way the upper leg connects to the pelvis naturally limits how much the hip can change angle, so...
Most probable mechanism
When lifting weights, the way the hip moves stays similar between two types of lifts because the muscles and tendons around the pelvis and upper thigh pull in consistent ways, keeping the pelvis and thigh bone aligned in a stable position during the middle part of the movement, even if other joints like the knees bend differently.
Gluteal and hamstring muscles generate tension that stabilizes the pelvis relative to the femur during both lifting patterns.
Pelvic orientation remains constrained by the biomechanical linkage between the lumbar spine, sacrum, and femoral heads, limiting variability in hip joint angle at mid-thigh and knee height.
The relative positioning of the femur and pelvis is maintained by passive tissue tension and joint capsule resistance, reducing angular deviation despite differences in knee and ankle kinematics.
Evidence from Studies
Supporting (1)
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