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Feet sustain 2 or 3 times your body weight
Each foot has more than 100 muscles, tendons, and ligaments
6 times force of gravity is exerted on the foot during aerobic activity
67 million Americans walk to exercise
When rebounding in basketball, 10 times the force of the jumpers body weight during the landing phase
25,000 heel strikes during a marathon
Body weight of tennis player is magnified 3 to 4 times during start/stops
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Outsole- Traction, durability, various patterns(e.g.: tire of car)
Midsole- shock absorption, cushioning, stability(e.g.: suspension)
Upper- secures foot, stability(e.g.: body of the car)
Midsole
Upper
Outsole
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Carbon rubber- synthetic rubber with carbon, used in running shoes
Duralon- soft, synthetic rubber, used in running shoes
Gum rubber-traction for indoor surfaces, used in basketball, cross-training, and volleyball shoes
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Waffle-running shoes Herringbone-court shoes Hybrid- mix of waffle and herringbone,
cross-training All-trac-mixture of waffle, herringbone,
and hybrid, outdoor
*Enhancements (Flex grooves, outriggers)
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Eva- cheapest material, compressed foam, lightweight
Phylon-responsive, light, molded, contains Eva
PU-durable, stable, heaviest, firm Phylite-composed of Phylon and rubber,
molded, acts as a midsole and outsole
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Footframe Contoured footbed Footbridge Midfoot shank Dual density Phylon
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Test run Sport-specific Individualized Determine Foot-type Workout Regime
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What is most important about buyinga sport specific shoe? Should we take into account gender when Selecting a shoe?
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Prevention of injuries Performance driven shoe Gender-specifically designed (weight,
structure, cushioning etc)
Key: cushioning, stability, surface, distance
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OVERPRONATION SUPINATION
Roll of the foot too far inward
Weight on the inside of the foot
Unstable Flat/low arches
*Pronation-normal motion of foot
Opposite of pronation
Weight on the outside of the foot
Higher arches
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Overpronation Supination
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Curved Last- will benefit individuals with a high arch (flexibility)
Straight Last- beneficial for individuals with over-pronated feet (stiffness)
Semi-curved Last- flexibility and stability
*Activity
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Aerobics- shock absorption, forefoot cushioning and stability, lateral movement, cross-trainer
Biking/Cycling- really need a shoe engineered for biking but you can pass with a cross-trainer, stiff, rigid outsole, shank
Hiking-uneven ground, need good traction and flexible shoe on forefoot, trail-running shoe
Running-rolling motion of the foot, slightly elevated heel
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Basketball-lateral movement, pivoting, cutting, start/stops, jumping, hard surface, ankle support, shock absorption
Volleyball- midfoot cushion, responsive shoe, flexible
Walking-cushioning and stability Tennis-needs to be specifically designed
for tennis to allow some sliding, start/stops, lateral movement, soft arch, padded forefoot
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-Replacement of your shoes with wear and tear is imperative
-Signs of wear:-worn out outsole-cracks in midsole-diminished elasticity
-Ramifications of wearing old worn-out shoes:
-back pain-knee pain-foot/ankle pain-Hip pain
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Run: 350-500 miles (4-6 months) Walk: 500-600 miles ( once a year) Cardio, weights: 70-90 hrs of exercise Basketball: every 3 months Determinants of Sneaker life span
-workout (type, frequency, duration, intensity
-weight
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Nike Free (3.0, 5.0, 7.0) Equalon Pegasus 360/180 Walker Shox Impax Basketball/volleyball Vapor Alvord
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Encapsulated Air- least expensive, absorbs impact
Visible Air- pressure distributed around heel Blow Molded-more complex, highest air
volume, sport specific Zoom Air-thin, responsive Tuned Air-highest air volume, sport specific,
specific to body weight, low air pressure Tube Air-softer, consistent cushioning over a
broader base, stability
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The fantastic foot. (2004). Foot Care Basics (2007).Spiker, T. (2007, June). THE RUNNER’S BODY. Runner’s World, 42(6), 79-80.The Art and Science of Athletic Shoes. (1991, October). Current Health 2,
18(2), 24.Kirby, M. (2005, October). TEST-RUN. National Geographic Adventure, 7(8),
48-48.Scott Frampton. Esquire. New York: Jul 2006. Vol. 146, Iss. 1; pg. 46, 1 pgSwitch out your sneakers. (2006, September). Shape.Radovic, P. (2005). Running & your feet. California Foot & Ankle Associates,
Inc (2005).Nike On-Boarding