the Impact of Pelvic Changes on Leg Alignment and Growth

Q: the Impact of Pelvic Changes on Leg Alignment and Growth

Hello： In response to your question, humans are upright animals, and the lower limbs physiologically undergo a normal process of knee varus (inward angulation), valgus (outward angulation), and slight external rotation. <br>However, not everyone experiences this to the same degre

excuse me?

Dear Dr.
Lee,
I originally had very straight legs, but they have since developed into a condition similar to bowlegs (where the knees are angled outward).
I am wondering if an increase in pelvic size could affect the legs.
Additionally, I previously took height-increasing medication (which was completely ineffective); could that have any impact? Since I was already in my twenties and past the growth period, it seems it shouldn't have any effect, right? Thank you, Dr.
Lee!

COCO, 20~29 year old female. Ask Date: 2006/02/26

Dr. Li Wenlin reply Orthopedics

Hello: In response to your question, humans are upright animals, and the lower limbs physiologically undergo a normal process of knee varus (inward angulation), valgus (outward angulation), and slight external rotation.
However, not everyone experiences this to the same degree; a small number of individuals may have knee varus (commonly referred to as bow legs) due to familial predisposition or individual anatomical variations, persisting even after skeletal maturity.
It is important to differentiate between normal knee varus and that caused by pathological conditions.
Pathological causes of bow legs, such as osteochondrodysplasias or rickets, may require supplementation of vitamin D and calcium, the use of braces, or surgical correction.
There is also a condition known as Blount's disease, characterized by a growth disturbance of the medial aspect of the proximal tibia, with an unclear etiology, which may necessitate surgical intervention in severe cases.
The differential diagnosis between normal and abnormal bow legs is not difficult; over 90% of the bow legs observed clinically are normal, with only a very small percentage requiring special treatment.
Your situation likely falls within the category of normal bow legs, and after skeletal maturity, changes in pelvic size or weight loss medications should not significantly affect the condition.
It is expected that the shape will stabilize without major changes.
If you still have concerns, please consult an orthopedic specialist for evaluation! Wishing you all the best!

Reply Date: 2006/02/26

More Info

The relationship between pelvic changes and leg alignment, particularly the development of conditions such as bowlegs (genu varum), is a complex topic that involves understanding human anatomy, biomechanics, and growth patterns.
Firstly, it is essential to recognize that the pelvis plays a crucial role in the alignment of the lower extremities. The pelvis serves as the foundation for the spine and the legs, and any changes in its structure can potentially influence leg alignment. For instance, an increase in pelvic width or changes in pelvic tilt can affect the way the femur (thigh bone) interacts with the tibia (shin bone) and fibula, leading to alterations in knee alignment. This can manifest as bowlegs or other alignment issues. However, it is important to note that variations in leg alignment can also be influenced by genetic factors, muscle imbalances, and overall body mechanics.

Regarding your concern about the effectiveness of growth supplements taken in your twenties, it is crucial to understand that the growth plates in long bones typically close after puberty. For most individuals, this occurs between the ages of 16 and 18 for females and 18 to 21 for males. Once the growth plates are closed, no further increase in height is possible, regardless of any supplements taken. Therefore, if you were already in your twenties and past your growth phase, it is unlikely that any growth supplements would have had an effect on your height.

Additionally, the development of bowlegs can occur due to various reasons, including genetic predisposition, nutritional deficiencies (such as vitamin D deficiency leading to rickets), or mechanical factors such as improper footwear or physical activity patterns. If your bowlegs developed after a period of having straight legs, it may be worth considering whether any changes in your lifestyle, physical activity, or body weight could have contributed to this change.

If you are concerned about the alignment of your legs or the impact of pelvic changes on your overall posture and biomechanics, it may be beneficial to consult with a healthcare professional, such as an orthopedic specialist or a physical therapist. They can assess your specific situation, provide guidance on exercises to strengthen the muscles around the pelvis and legs, and recommend strategies to improve alignment and function.

In summary, while changes in the pelvis can influence leg alignment, the development of bowlegs is multifactorial and may not be solely attributed to pelvic changes. Furthermore, if you are past your growth phase, growth supplements will not affect your height. If you have ongoing concerns about your leg alignment or pelvic health, seeking professional advice is the best course of action.

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