Hamstring Mobility
If you were to look at the
hamstring muscles (biceps femoris, semitendinosus, and
semimembranosus) of the general population, you would find that the majority of
people, especially those who sit with poor posture, have “tight” hamstrings.
Why should you care
about hamstring mobility?
“Tight” hamstrings are chronically
shortened. Chronically shortened hamstring muscles are problematic for many
reasons but in an attempt to keep this post brief, I will discuss only two.
1.
Tight
Hamstrings can cause low back pain
The hamstring
muscles (with the exception of the short head of the biceps femoris) attach to
the ischial tuberosity which is part of the pelvis. Tight hamstrings both
result from and subsequently cause a posterior pelvic tilt.
When the pelvis
is chronically pulled into a posterior tilt by tight hamstrings, it cannot
properly/smoothly tilt anteriorly in synchrony with the low back. As a result,
people with tight hamstrings will often unknowingly compensate for the lack of
movement in the pelvis with excessive movement of low back, which puts a lot of
strain on the lumbar spine. Additionally, tight hamstrings constantly force the
lumbar vertebrae into flexion which increases the compressive forces on the
vertebral discs.
1.
Tight
Hamstrings can wreak havoc on your knees
Because the hamstring muscles
cross both the hip and the knee joints, they act to extend the hip and flex the
knee. Without sufficient control over the hamstring range of motion, people
will often compensate for tight hamstrings with the quads. Compensation with
the quads feeds into a vicious cycle where the quads become stronger and
stronger while the hamstrings become weaker and weaker.
This compensation and muscle
imbalance puts an enormous strain on the knee and can eventually lead to knee
injuries and pain.
How can I work on the
mobility of my quads and hip flexors?
Good question. If you want to learn more about taking care
of your hamstrings, check out our 15-minutes of Flo where Johnny Rodriguez
discusses hamstring mobility and flexibility.
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