Lecture 1 - Protective Equipment Flashcards
What are the 4 principles of protective equipment?
- dissipation
- deflection
- absorption
- deformation
what are the properties that affect deflection?
- round shape
- hard
- smooth
- ridges
what are the properties that affect dissipation?
- layers
- various materials
- larger surface
what are the properties that affect deformation?
- cantilever pads (change in shape/structure)
- materials that blow apart at high force
what are the properties that affect absorption?
- felt, foam (open or closed cell), air or fluid pockets
how does density affect resistance/absorption? (pucks vs. people)
- increased density = greater resistance at high force
- decreased density = more absorption at lower force
what is the purpose of felt on athletic equipment?
- stays still (doesn’t shift against the skin)
- absorbs fluids (becomes heavy) –> must be replaced daily unless built into the equipment
what is the purpose of open cell foam on athletic equipment?
- doesn’t bounce back
- pads bony prominences
- used to protect skin under hard edges of protective equipment
- for comfort
what is the purpose of closed cell foam on athletic equipment?
- for protection
- high resilience (back to shape quickly)
- less comfortable on the skin
what is the difference between a curved last and a straight last external shoe?
- curved is for stability, medial deviation of the forefoot and hollowed-out longitudinal arch
- straight is for motion control, solid plantar surface, extended midsole in medial longitudinal arch an increased base of support
what is the difference between a slip lasting and a board lasting internal shoe?
- slip lasting (line down the middle) is for increased flexibility and for neutral feet
- board lasting (one piece) is for increased torsional resistance to pronation, better for orthotics
what is the purpose of the upper shoe components?
- control midfoot
- conforms to bony abnormalities
what is the purpose of the midsole shoe compartments?
- shock absorption vs. motion control
- densities will vary depending on sport
what is the purpose of the outsole shoe comparements?
- protective layer
- protection, durability, flexibility and traction
- sport and location specific
what is the purpose of the heel counter in a shoe?
- protect/cushion the ankle and achilles tendon
- resist motion in the ankle
