Contractions
The activation of tension-generating sites within muscle cells, which can result in muscle shortening, lengthening, or remaining at the same length
What is contraction?
Pennate muscle fibers are organized....
Pennate fiber arrangement: short fibers attach to one or more tendons within the muscle
Rigid bar that turns about an axis of rotation or a fulcrum.
What is a lever?
The interaction that creates work, action, or physical change.
What is force?
What is biomechanics?
The study of the mechanical aspects of physical movement, such as torque, drag, and posture
When both the agonist and antagonist undergo contraction.
What is co - contraction
Parallel muscle fibers are organized...
Parallel fiber arrangement: fibers are roughly parallel to the longitudinal axis of the muscle
The point on which a lever rests or is supported and on which it pivots.
What is the fulcrum?
What is Motion?
The process of changing position or place of a body in space
A vertical line straight down from the center of gravity.
What is line of gravity?
A type of muscle activation that increases tension on a muscle as it lengthens.
What is the definition of eccentric contraction?
A muscle fiber is a _____________ muscle cell surrounded by a membrane called the _____________________ and containing specialized cytoplasm called ________________
Single, Sarcolemma, Sarcoplasm
Fulcrum in the middle, the effort is applied on one side of the fulcrum and the resistance on the other.
What is a first class lever?
Examples of an activity that requires power
Sprinting, oly lifts, box jumps, etc.
The magnitude of twist around an axis of rotation (fulcrum).
What is Torque?
A muscle activation in which the muscle fires but there is no movement at the joint and no change in length of the muscle.
What is isometric contraction?
Eccentric contraction (in which the muscle is actively stretched) followed immediately by concentric contraction
What is the stretch shortening cycle?
A lever in which the load lies between the fulcrum and the effort.
What is a second class lever?
The movement of a joint from full flexion to full extension.
What is range of motion?
What is magnitude?
How much force is applied
A type of muscle activation that increases tension on a muscle as it shortens.
What is the definition of concentric contraction?
Fast twitch (FT) fibers both reach peak _____________ and _________ more quickly than slow twitch (ST) fibers. (Peak tension is typically greater for ______ than for ______ fibers.)
What is - Tension, Relax, and FT; ST
A lever in which the effort is placed between the fulcrum and the load.
What is a third class lever?
What is magnitude, direction, point of application, line of action?
Define extensibility and elasticty
Ability to be stretched or to increase in length
Ability to return to normal resting length following a stretch