Exercise Physiology & Kinesiology Flashcards

Which collagen type makes up most of healthy tendons and ligaments and provides tensile strength?

Answer: Type I

Type I collagen forms thick, strong fibers that resist tensile loads in tendons and ligaments.

During the proliferative phase of soft tissue healing, the early, weaker collagen laid down is mostly:

Answer: Type III

Fibroblasts first deposit Type III collagen, which is gradually replaced by Type I during remodeling.

The principle that soft tissue remodels according to the mechanical demands placed on it is known as:

Answer: Davis's law

Davis's law describes soft tissue adapting to imposed stress, while Wolff's law applies to bone.

A tendon slowly lengthens under a constant, sustained load. This viscoelastic property is called:

Answer: Creep

Creep is gradual deformation over time under a constant load.

On a stress-strain curve, loading tissue into the plastic region results in:

Answer: Permanent deformation with microfailure

Beyond the elastic limit, collagen crosslinks fail and the tissue does not return to its original length.

After unaccustomed eccentric exercise, delayed onset muscle soreness usually peaks at:

Answer: 24 to 72 hours

DOMS usually starts within about 12 to 24 hours and peaks between 24 and 72 hours.

The process by which cells convert mechanical stimuli, such as IASTM loading, into biochemical responses like fibroblast activation is called:

Answer: Mechanotransduction

Mechanotransduction is the cellular basis for how controlled mechanical load can stimulate fibroblast activity and tissue remodeling.