Uncontrollable Factors Flashcards

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1
Q

What factors can be modified, however with limitations?

A

Coordination, Body Weight, Posture, Stiffness or Imbalances

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2
Q

At what age range does bone mass peak?

Why does it decrease every decade after this?

A

20-40 years old

Tensile strain/stress, failure of energy absorption, tendons less resistant to tension

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3
Q

What tissue properties change in older adults?

A

1) Decreasing bone mass after 40+
2) Decrease bone compressive strength
3) Ultimate tensile strength of ACL lowers by 60% from 20-65%

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4
Q

The Older Athlete:
What % does exercise reduce the strength declines?

What is a common overuse injury in the elderly?

A

Exercise reduces the decline in strength by 50% - slows down ACL strength reduction

Osteoarthritis

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5
Q

What are the differences between males and females?

A

Women more likely to have different injury causes due to:

Body shape, hormonal imbalances, wider pelvis, lower lean muscle mass

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6
Q

What are the 2 sources of leg-length discrepancy’s?

A

1) Anatomical –> actually different lengths

2) Functional –> appear to be different but could be due to foot architecture/frontal plane displacement

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7
Q

What are some other discrepancy’s?

A
Genu Varum (bow legs)
Genu Valgum (knock knees)
Muscle Attachment Position
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8
Q

How does the femur angle affect biomechanical abnormalities?

A

Key bone in leg orientation
The femoral neck relative to the shaft position is described by:
Angle (frontal) –> 125 degrees and Anteversion (horizontal)

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9
Q

What are two examples of lower extremity problems?

A
Trendelenburg Gait (weak hip abductors - leg swung outwards)
Hip Hitching (prevents foot from contacting the ground -key for race walkers)
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10
Q

What are the 3 types of arches that are formed to protect the foot?

A
Lateral Arch (cuboid)
Medial Arch (talus)
Transverse Arch (foot centre)
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11
Q

Flat Feet:
What is the proper term and what is it?
What can it lead to/implications?

A

Pes Planus - flat and flexible feet - pronation during gait

Leads to tibial torsion and increases femoral rotation, implicated in overuse injuries

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12
Q

High Ankles:
What is the proper term and what is it?
What can it lead to/implications?

A

Per Cavus - rigid - supination during gait

External femoral rotation and implicated in overuse injuries (stress fractures)

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13
Q

What are 2 different lower limb problems?

A

Compartment Syndrome –> located in the shin, intramuscular activity impedes blood flow (shin splints)

Morton’s Metatarsalgia –> nerve caught between two bones causing severe pain when running

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14
Q

What are the 2 different upper body posture problems?

A

Excessive scapular abduction can lead to impingement syndrome and can arise from:

Cervical Spine Lordosis
Thoracic Spine Hyphosis

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15
Q

What can put stress on the shoulder joint in Tennis players?

A

Inability to achieve full abduction, adduction, elevation

Malformed acromium process / different muscle attachments can have an effect

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