Skeletal Musculature
The distal attachment of a muscle that is a more mobile structure is
Insertion
Demonstrate anatomical position
Body is erected, arms are down and to the sides, palms are facing forward
Determination of which and how many motor units are involved in a muscle contraction is defined as
Recruitment
What are the five sources of resistance to muscle contraction
Gravity, inertia, friction, fluid resistance, and elasticity
What are the four common places for injury
back, shoulders, knees, and elbows and wrists
What is the tricep referred to as when the arm is performing a bicep curl?
The antagonist
Transverse separates what portions of the body?
Equation for acceleration
Force = mass * acceleration
With friction, what type of force is required to start a movement, and what force is required after movement has started
High, Constant
What area(s) of your spine are kyphotic
Thoracic spine
What lever is this showing
Frontal separates what portions of the body?
Front and back
What is the equation for power
Power = work / time
What are two sources of fluid resistance and definitions for each
Surface drag (friction of a fluid passing along the surface of an object, swimming and water is going around you) and form drag (fluid pressing against the front or rear of an object passing through it, baseball passing through air)
What area(s) of your spine are lordotic
Cervical spine and lumbar spine
If your quad inserts higher up on your femur than your partner, who's squat will have a slower velocity?
Partners
Sagittal separates what portions of the body?
Left and right
What do muscles with a greater pinnation angle have more of
Greater sarcomeres in parallel (end-to-end) and fewer sarcomeres in series (side-to-side)
Inertial force can be defined as these two characteristics
Define valgus and varus
Valgus: knees caving in
Varus: knees pushing out
When performing a lateral raise, what lever(s) are being used?
Third
When completing a rotational box jump, what plane(s) of motion are you moving through?
Sagittal and transverse
Muscle force is greater when these things are present/happening in the muscle
More motor units are involved in contraction, motor units are greater in size, and rate of firing is faster
How does gravity have applications to resistance training
Horizontal distance from a given joint axis changing constantly
- when the weight is horizontally closer to the join, it exerts less resistive torque; when further, it exerts more resistive torque
Stability of the shoulder joint depend on these elements of the shoulder
Glenoid labrum, joint synovium, and capsules, ligaments, muscles, tendons, and bursae
Rotator Cuff: Supraspinatus, infraspinatus, subscapularis, and teres minor
Pectorals