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BlazeSports Institute for Applied Science CDSS Level I & II Curriculum. Manual Sport Chairs: Sizing, Fitting, Transfers, Maintenance and Repair. We would like to thank Brock Beasley, ATP, RRTS, CDSS of Alliance Seating and Mobility
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BlazeSports Institute for Applied Science CDSS Level I & II Curriculum
Manual Sport Chairs: Sizing, Fitting, Transfers, Maintenance and Repair
We would like to thank Brock Beasley, ATP, RRTS, CDSS of Alliance Seating and Mobility for his contributions to the content of this presentation.
WHAT WE’LL COVER • Common types of manual sports chairs • Components of sports chairs • Proper fit = PERFORMANCE • Routine maintenance • Tools needed • Transfer safety
Common types of manual sports chairs • Court Chairs • Basketball • Softball • Football • Tennis • Rugby • Dance • Racing Chairs • Racing Wheelchair • Handcycle • Fourcross • Field Chairs
Common types of manual sports chairs • Rigid, Custom Fit • Designed to fit your body and your specifications • Dimensions and accessories per your specifications • Advanced materials • Purchased after at least one year of trial and error with a adjustable chair • Adjustable • Perfect for program chairs • Allows for changes in dump, backrest height and center of gravity • Once chair can fit many different athletes/sports • NOT infinitely adjustable, still need to have a “typical” athlete in mind if ordering for a program
Court chair basics 1.Backrest 2. Rear Axle 3. Rear Wheels 4. Hand rims 5. Seat 6. Frame 7. Traverse Bar 8 Front Rigging 9.Footrests 10.Front Casters 11. Anti-Tip Casters
Backrests • Program chairs should have an adjustable height and angle backrest • Height should be set to allow for support while maximizing functional ability • More function = lower backrest • Angle should be set for player comfort • Less function = Angle > 90 degrees • Upholstery should be adjustable to allow for tension adjustments
Cushions • The Sport Cushion gives wheelchair users pressure relief, reduces shearing and increases ventilation that allows for true heat and moisture control. • There are cushion height limitations in wheelchair basketball. • Program chairs need to have cushions cleaned and maintained on a regular basis.
REAR wheels • Four Basic Sizes for Court Chairs • Wheel size determined by frame size • 24” = 23 or 25 x 540 Tube/Tire • 25” = 23 or 25 x 559 Tube/Tire • 26” = 23 or 25 x 590 Tube/Tire • 700C = 23 x 622 Tube/Tire
REAR wheels • Parts of a Wheel • Rim • Spokes • Bearings • Hub • Check spoketension daily • Tighten asneeded to keep wheeltrue
Hand rims • Options • Coated or Bare Metal • Vinyl or Foam Coated • Aluminum or Titanium • 12-Tab or 6-Tab • Standard or Short Tab
Quick release axles • Sizes • 4.5” to 5.5” by 0.25” Increments • Length determined by hub size • Adjustment • Nut • Spacers/Washers
Inner tubes • Sizes • 24” x 1 = 23 or 25 x 540 Tube/Tire • 25” x 1 = 23 or 25 x 559 Tube/Tire • 26” x 1 = 23 or 25 x 590 Tube/Tire • 700C x 1 = 23 x 622 Tube/Tire • Valves • Schrader • Presta • Adapter for standard pumps • Rim Tape • Protects tube
Inner tubes • Pressure • 100 to 110 psi • In a Bind….. • You can use larger tubes on smaller tires by folding the tube over itself • You can typically use one size smaller tube (24” tube on a 25” wheel) • Recycle Used tubes make great straps for rugby!!
Tires • Tires are NOT All Equal!! • Kenda is manufacturer of choice • Kontender • Koncept • Kaliente • Know thecheappies!
Tires • Invest • Spend a little more now for fewer problems later • More puncture resistant • More durable tread • Better traction • In a Bind… • Flip the tire (remove from rim and put inside on outside of rim) when one side is work out, similar to rotating the tires on your car
Changing tires & tubes http://youtu.be/x2_Qspr9Bog
Front Casters • Material • Solid Polyurethane • Size • 3” & 4” • Hardware • Wheelchair Caster Bolt Nut (5/16-24) • Wheelchair Caster Bolt (5/16-24 x 2.5) • Spacer for Wheelchair Front Axle – Caster • 5/16" Sealed Wheelchair Caster Bearings
Anti-tip bars • Single & Double Configuration • Choice depends on sport and position • Adjust height as needed • Standard on most court chairs
Strapping Velcro Straps Size Standard and Custom Use anywhere • Click Straps • Size • Large = Hips • Medium = Thighs • Small = Feet
Sizing and Fitting a Sports Chair Standard Sports Chair • Seat Dimensions • Width, Depth, Dump • Back Dimensions • Height, Angle • Camber of Wheels • Sport • Stability of chair • Controlling movement
Sizing and Fitting a Sports Chair • Seat DepthMeasure from the most posterior point of the body to the inside of the knee, minus at least two inches. • Seat WidthDetermined by the widest point of the body from knee to hip. Should be measured with clothing similar to what will be worn during activity. • Back HeightMeasured from the seat base to the top of the chair back. Depends on how much upper back support is needed, and also affects freedom for the upper body to rotate. This is often very different for a sports chair compared to an everyday chair. Athletes with less trunk function may also want the backrest angled.
Sizing and Fitting a Sports Chair • Rear Seat to FloorMeasurement from the ground to the rear seat edge. Relative to the front seat-to-floor dimension, this determines the rearward slope ("dump" or "squeeze") of the seat. • Front Seat to FloorMeasure the leg from the back of the knee to the sole of the foot. Then subtract the thickness of the cushion when it is compressed. Next, add a minimum of two inches for footrest clearance. This will set the maximum chair height, not to exceed 21” or 53 cm.
Sizing and Fitting a Sports Chair • Wheel CamberAngle of the wheel relative to the vertical. More camber improves stability and agility, but also limits ability to pass through narrow spaces. A typical daily chair uses three degrees of camber. • Sport Chair Camber Options • 12, 15, 16, 18, 20 Degrees • Tennis = 18-20 degrees
Racing chairs A complete training manual for track and field is available online and free of charge from BlazeSports.
Parts of a racing chair • Cage: The seating area of a racing chair. It is built according to an athlete’s body dimensions. • Main Tube: The base of the racing chair that bridges the front wheel with the rear wheels. • Axle Tube: The tube running perpendicular to the main tube into which the rear wheels attach. • Headset: Attaches the steering and front wheel to the main tube. • Handle Bars: Attached to the headset and allows the athlete to maneuver the front wheel. • Fork: Attached to the headset and serves to hold the front wheel. • Hand Ring: A ring mounted onto the rear wheels used for propulsion. • Hub: Axle housing and center of wheel. • Fenders: Side guards that provide protection for the torso and arms from road debris and the rear wheels.
Fitting a racing chair • Extension of the athlete's body • Oversized chair wastes energy • Fit snug to athlete’s chest and hips • Should not create constant rubbing or restricted blood flow • Manufacturer’s Order Forms • Typically easy to understand but ALWAYS ask, do not assume • Use manufacturer’s rep when possible
The right Position • No two athletes are the same • Primary position determinants • Body Dimensions • Functional Ability • Two seating Options • Tucked, kneeling • Extended • Goals • Optimal sitting stability • Angle of back seat posts and upholstery should conform to curvature of lower back • Maximum coverage of hand ring
Camber • Camber • 7-13 Degrees, 11 to 13 most popular
wheels • Wheels • Rear = 700C • Front = 20” • Younger/Smaller Athletes • Rear = 26” (590) • Front = 18” • Spokes • Younger/Lighter = 24-28 spokes • Older/Heavier = 28-36 spokes
wheels • Wheels • Elite • Carbon Fiber • Tri-spoke • Quad-spoke • Disc
Hand rings • Size • 10 to 16” • Most Common • 14” Females • 14.5” Males • Carbon Fiber • Benefits • Smaller = High Top Speed • Larger = Quicker Acceleration
Hand rings • Stand Offs • 1/16 to 1.5” • Contact • Inside of ring use shorter stand off • Outside of ring use longer stand off
Tires • 2 Types • Clincher • Separate tube and tire casing • Sew-Up • Tube and tire casing single unit • Similarities • Performance • Profile (18mm) • Weight (165gm) • High Pressure (130 psi)
Tires • Differences • Clincher • Less maintenance • Install similar to court chair tire • Repairable for < $10 • Sew-Up • Glue on • Choice of elite racers for ease of tire change • NOT repairable, new tire > $60
Handcycles & Fourcross • Types • Function • Recreational • Touring • Racing • Off-Road • Downhill • Seating • Upright, Recumbent, Kneeler
Handcycles & Fourcross • Types • Steering • Fork • Lean • Seating • Upright • Recumbent • Kneeler