Frog Legs: Assessing Military Fitness and Hip Flexibility - Orthopedics

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How to determine frog legs?


Hello Doctor: My brother is currently serving in the military, but he has frog legs, which is medically known as gluteal muscle fibrosis.
I would like to ask if being able to lift his leg to 140 degrees, with an external rotation of 40 degrees and an internal rotation of 20 degrees, qualifies him for alternative military service.
Thank you for your response.

Xiao Lun, 20~29 year old female. Ask Date: 2004/11/23

Dr. Huang Longde reply Orthopedics


Hello, Xiao Lun: The so-called "frog legs" refer to gluteal muscle fibrosis, which may be caused by congenital factors, injury, or injections.
According to the current standards for the assessment of injuries and illnesses for alternative service personnel, item 116 states the following (the patient is examined while lying flat on the bed): 1.
When the thigh is in the mid-position, the hip flexion angle is less than 120 degrees.
2.
When one thigh must be abducted or externally rotated more than 60 degrees, the other hip joint can only flex to its maximum angle.
3.
When the hip joint is flexed to its maximum angle, the thigh cannot perform any internal rotation movements.
Xiao Lun's brother's hip flexion angles are as follows: anterior flexion 140 degrees, external rotation 40 degrees, and internal rotation 20 degrees, which do not meet the standards for gluteal muscle fibrosis in alternative service personnel.

Reply Date: 2004/11/23

More Info


Understanding the condition commonly referred to as "frog legs," or more formally known as hip flexor tightness or gluteal fibrosis, is essential in assessing military fitness and overall hip flexibility. The measurements you've provided—leg elevation of 140 degrees, external rotation of 40 degrees, and internal rotation of 20 degrees—are significant in determining whether your brother meets the physical requirements for military service or if he may qualify for alternative service.

Hip Flexibility and Military Fitness:
In military settings, physical fitness is crucial, and flexibility plays a vital role in overall performance. The hip joint's range of motion is particularly important for activities such as running, jumping, and maneuvering in various terrains. The ability to achieve a full range of motion in the hip joint can prevent injuries and enhance performance.
The measurements you provided indicate that your brother has a good degree of hip flexion (140 degrees), which is generally considered adequate for most physical activities. However, the external rotation of 40 degrees and internal rotation of 20 degrees may suggest some limitations. Normal hip external rotation typically ranges from 30 to 60 degrees, while internal rotation ranges from 30 to 40 degrees. Your brother's internal rotation appears to be on the lower end of the spectrum, which could indicate tightness or restrictions in the hip flexors or surrounding musculature.

Implications of Gluteal Fibrosis:
Gluteal fibrosis, or the thickening of the gluteal muscles, can occur due to various factors, including prolonged sitting, lack of stretching, or previous injuries. This condition can lead to decreased flexibility and may affect the biomechanics of the hip joint. If your brother is experiencing discomfort or limitations in his range of motion, it may be beneficial for him to engage in targeted stretching and strengthening exercises to improve his hip flexibility and overall function.

Military Service Considerations:
Regarding military fitness assessments, each branch of the military has specific physical requirements that candidates must meet. If your brother's hip flexibility and overall physical condition are deemed insufficient, he may be evaluated for alternative service. The criteria for alternative service can vary, but generally, they consider the individual's ability to perform essential military tasks without risking injury to themselves or others.

It is advisable for your brother to consult with a military physician or a physical therapist who specializes in sports medicine. They can conduct a thorough assessment of his hip flexibility and overall physical condition, providing tailored recommendations for improvement. This may include a structured rehabilitation program focusing on flexibility, strength, and functional movement patterns.

Conclusion:
In summary, while your brother's hip flexion appears adequate, the limitations in internal rotation may warrant further evaluation. Engaging in a dedicated program to improve flexibility and strength in the hip region can enhance his overall physical fitness and potentially mitigate any concerns regarding military service eligibility. Regular assessments and adjustments to his training regimen will be essential in ensuring he meets the necessary physical standards.

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