bicycling injuries mitchell l. goldflies, md. topics history of bicycles overview of bicycling...
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Bicycling Injuries
Mitchell L. Goldflies, MD
Topics History of bicycles Overview of bicycling injuries Bicycle components & riding gear Biomechanics of cycling Bicycle fitting
Topics Evaluation of injuries Overuse injuries Acute injuries Rehabilitation of injuries Training techniques
Bicycle History
Bicycle History Bicycle invented in early 1800’s 2-wheels connected by piece of
wood Penny Farthing bicycle
Pedal on front wheel Height of front wheel variable
Bicycle History Early 1900’s chain-driven bicycle
Bicycle History Early 1900’s chain-driven bicycle Little change in bicycle last 80
years
Bicycling Injuries Overview
Bicycling Injuries Acute
Motor vehicles Road surface Mechanical problems
Bicycling Injuries Acute
Motor vehicles Road surface Mechanical problems
Overuse Too much pedal resistance
Use lower gear ratio Use higher pedal cadence
Bicycling Injuries Prevention
Proper safety equipment Keep bike in top mechanical condition Anticipate errors of others Adopt and practice specific riding
strategies to prevent injuries
Bicycling Injuries Prevention
Common sense Stretch Sun screen Hydration & nutrition breaks Insect bites
Bicycling Injuries Prevention
Helmets Standard Full face
Padding Chest Shoulder Extremity
Bicycle Injuries Injury pattern has remained the
same for the past 60 years
Bicycle Injuries Injury pattern has remained the
same for the past 60 years The knee is involved with the most
common and serious cycling related overuse injuries
Bicycle Injuries Injury pattern has remained the
same for the past 60 years The knee is involved with the most
common and serious cycling related overuse injuries
Low injury rate compared to running and soccer
Bicycle Injuries Cycling accidents are responsible for
significant morbidity and mortality Death and hospitalization rates are highest
among male children and adolescents 5-19 years of age
Fatal and nonfatal bicycle head injury rates are highest in towns with a population less than 50,000 residents
Most acute injuries occur from simple falls from the bicycle
Bicycle Injuries Cycling accidents are responsible for
significant morbidity and mortality Majority (>60%) of fatalities are caused
by head injuries resulting from accident involving motor vehicles
Up to 85% of cycling fatalities caused by head injuries could be prevented by the use of appropriate cycle helmet
Bicycle Injuries Cycling accidents are responsible
for significant morbidity and mortality In 1997 225 children ages 14 and
under died in bicycle-related crashes Bicycle helmet use
15-25% use among child bicyclists 11% use for ages 11-14
Bicycle Injuries Cycling accidents are responsible
for significant morbidity and mortality Elevated blood alcohol concentrations
are found in 1/3 of fatally injured bicyclists aged 15 years and older
9.4 injury events per 1000 children in Kingston, Ontario in 1994
Bicycle Components & Riding Gear
Bicycle Components Frame material selection
Steel Aluminum Carbon fiber Titanium
Bicycle Components Road frame types
Upright Road Triathlon Touring Track Cruiser
Bicycle Components Frame selection
Upright Suspension-beam
Bicycle Components Frame selection
Upright Mountain Cyclecross Hybrid BMX Comfort
Bicycle Components Frame selection
Recumbent Steering
Above seat Below seat
Bicycle Components Frame selection
Recumbent Tricycle Tadpole tricycle Quadcycle Arm powered Rowing
Bicycle Components Frame selection
Tandem
Riding Gear >12 mph wind resistance greatest
factor limiting speed Cycling clothes decrease wind
resistance & chafing
Riding Gear Helmet 1000 cycling deaths per year
Most had head injuries 1/3 head injuries fatal
Glasses Rear view mirror Jersey Pants
Riding Gear Gloves
Decrease hand pressure Decrease abrasion
Socks Shoes
Less foot numbness with clipless pedals
Orthotics
Bicycling Biomechanics & Bicycle adjustment
Biomechanics of Cycling Pedal Cycle 1 complete circular motion of
pedal Power phase-push forward and down
on pedal Recovery phase-pull up and backward
on pedal
Biomechanics of Cycling Pedal Cycle Power phase muscles
Quads-extend knee and push foot forward
Hamstrings-hip extension Calves-ankle plantar flexion Gluteals-hip extension
Biomechanics of Cycling Pedal Cycle Power phase joint motion
Hip 50-75 to 10-20 deg. flex Knee 110 to 35 deg. flex Quadriceps Q angle Spin vs. pushing Ankling-terminal power phase Standing out of saddle and using
upper body
Biomechanics of Cycling Pedal Cycle Recovery phase muscles
Quads-knee extension & hip flexion Hamstrings-knee flexion Anterior tibialis-ankle dorsiflexion Iliopsoas-hip flexion
Biomechanics of Cycling Pedal Cycle Increased pedal cadence
Increase muscular activity No change in joint load
Increase saddle height Decrease maximum knee flexion
moment No change in hip flexion and ankle
dorsiflexion moment
Biomechanics of Cycling Pedal Cycle Cadence
>70 pedal RPM. Best 80-120 RPM. 5000 revolutions per hour
Imbalance of VMO and Vastus lateralis increases Q angle at knee
Biomechanics of Cycling Compared to Walking Moments same
Varus and Valgus at knee Ankle and achilles
Increased lower limb muscular activity VMO Vastus lateralis
Decreased lower limb muscular activity Anterior tibialis
Lower tibio-femoral and ACL shear
Bicycle Adjustments Frame
1” clearance between top tube and crotch when standing
Lower on mountain bike and sloping top tube bike
For recumbents measure the distance from the wall to heels when sitting against the wall
Bicycle Adjustments Seat height
High-spin Low-push Spin with heels on pedals and pelvis level
Seat position Plumb line from behind patella to pedal
spindle with pedal forward Forward-spin Backward-push
Bicycle Adjustments
Bicycle Adjustments Crank arm length
Floor to greater trochanter X 0.185 Longer for push Short for spin
Handlebar-type/width/angle Width-distance between coracoid
processes Keep upper body at 45 to 90 deg.
Bicycle Adjustments Pedal
Angle of gait Width Shims Ball of foot at or forward of pedal
spindle Cleat position
Fore and aft Rotation
Bicycling Injuries
Bicycling InjuriesEvaluation History
General past medical history Cycling specific history
Where in the pedal cycle the pain is experienced
Terrain Gears How was bike fitted Training program
Bicycling InjuriesEvaluation Physical Examination
Gait evaluation General musculoskeletal
biomechanical examination Specific examination of injured area Inspection of bicycle Observation of cycling
Bicycling Injuries Evaluation Imaging studies
Standard Radiographs Bone Scan MRI CT Scan
Compartment pressure EMG-NCV
Bicycling InjuriesOveruse Biomechanical factors
Genu Valgum Genu Varum Internal tibial torsion External tibial torsion Overpronation Leg length discrepancy Patello-femoral malalignment
Bicycling InjuriesOveruse
Bicycling InjuriesOveruse Overtraining/burnout Muscle cramping/spasm Strength imbalance
Cross training Strength training
Bicycling InjuriesOveruse-Spinal Spinal Pain
Up to 60% riders Areas
Neck pain Upper back and shoulder pain
Trapezius Levator Scapulae
Low back pain
Bicycling InjuriesOveruse-Spinal Spinal pain treatment
Bike adjustment/modification for proper fit
Technique change More upright riding position Keep elbows unlocked Vary head position
Bicycling InjuriesOveruse-Spinal Spinal pain treatment
Use padded gloves Use padded or suspended handlebars Front fork suspension Wider tires Sit more upright Scapular stabilization Rear suspension or seat post
Bicycling InjuriesOveruse-Spinal Spinal pain treatment
Correct lumbo-pelvic dysfunction Correct leg length difference Cant seat Recumbent bicycle Medical treatment
Bicycling InjuriesOveruse-Hands Upper Extremity problems
Neck Shoulder Elbow tendonitis Wrist tendonitis Neuritis
Bicycling InjuriesOveruse-Upper Extremity Elbow Pain
Medial epicondylitis Lateral epicondylitis Related to repetitive twisting Allow for mild elbow flexion
Wrist and hand tendonitis deQuervain’s tendonitis Grasping and twisting
Bicycling InjuriesOveruse-Hands Hands-Handlebar problems
Neuritis in 15% long distance cyclists Tingling Numbness Weakness
Bicycling InjuriesOveruse-Hands Hands-Handlebar problems
Ulnar Nerve Handlebar neuropathy Most common compression neuropathy Compression in Guyon’s canal
Median Nerve Carpal tunnel syndrome
Bicycling InjuriesOveruse-Hands Hands-Handlebar solutions
Change hand position every 30 sec. Padded gloves and bars Full finger gloves Limit wrist flexion and extension
Bicycling InjuriesOveruse-Hands Hands-Handlebar solutions
Bicycle fit Fit kit Serrota sizing bike
Change handlebars/stem Suspension forks/handlebar stem Recumbent bicycle
Bicycling InjuriesOveruse-Hip/Pelvis Iliotibial Band tendonitis and
bursitis Trochanteric bursitis Include Gluteus Maximus stretch and
move handlebars up and back to decrease hip flexion
Rest/Ice/NSAIDS Surgical release
Bicycling InjuriesOveruse-Knee Patello-femoral Dysfunction
Patellar tracking-functional Q angle Compression syndrome Chondromalacia Patellae
Patello-femoral Dysfunction-Treatment Move seat up Spin in lower gears Adjust pedals-rotation, width and canting Modify pedal design
Bicycling InjuriesOveruse-Knee Quadriceps tendonitis Synovial plica Patellar tendonitis Meniscal injury Pes anserine tendonitis ITB friction syndrome at the knee Baker’s cyst
Bicycling InjuriesOveruse-Lower Extremity Muscle strain/cramping/ Tendonitis/Bursitis
Hamstrings-lateral more than medial Calf & Achilles tendon
Raise seat Stretch Shorter crank arms Heel lift in shoe
Bicycling InjuriesOveruse-Lower Extremity Muscle strain, cramping and
tendonitis Shin splints
Anterior tiblialis muscle Exertional compartment syndrome Soleus syndrome Tibial stress reaction/fracture
Bicycling InjuriesOveruse-Lower Extremity Ankle and foot
Conditions Ankle tendonitis Tarsal tunnel syndrome Retrocalaneal bursitis Plantar fasciitis Foot burning/numbness
Bicycling InjuriesOveruse-Lower Extremity Ankle and foot
Treatment Proper shoe wear and orthotics Adjust pedals Stretch Adjust seat height Night splint Surgery
Bicycling InjuriesOveruse Saddle related injuries
Saddle sores-skin ulceration Irritation Traumatic urethritis
Bicycling InjuriesOveruse Saddle related injuries
Pudendal nerve compression/neuropathy
Pressure on perineum from racing-saddles
Recurrent numbness in penis and scrotum
Altered sensation of ejaculation
Bicycling InjuriesOveruse Saddle related injuries
Pudendal nerve compression/neuropathy
Disturbance of urination Reduced awareness of defecation Male impotence
Bicycling InjuriesOveruse Saddle related injuries
Vulva trauma Chafing Perineal folliculitis Furuncles Subcutaneous perineal nodules
Bicycling InjuriesOveruse Saddle sores
Infection/pressure/friction Skin of upper thigh and rear end Furuncles and folliculitis Ischial bursitis Thigh chafing Skin ulceration
Bicycling InjuriesOveruse Saddle sores
Prevention & treatment Keep dry and clean Padded seat Good seat position Wound care Antibiotics
Topical Oral
Bicycling InjuriesOveruse Crotchitis
Women Warmth Moisture Friction Vaginal infections Allergies Bicycle position
Bicycling InjuriesOveruse-Treatment Manage saddle related problems
Change saddle Pad saddle Pad shorts Modify riding technique Recumbent bicycle
Bicycling InjuriesOveruse-Treatment Manage saddle related problems
Adjust seat Height Angle Fore & aft position
Stand up off the seat more often
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing 0.20-0.40% overall injury rate for
racing participants 0.30% for recreational participants 20-88% of riders have an injury per
year
Bicycle InjuriesAcute Off-road crashes
Excessive speed Unfamiliar terrain Inattentiveness Riding beyond one’s ability Loss of control
Bicycle InjuriesAcute Off-road crashes
High-speed descent Competition Downhill more than cross-country
More flat tires Mechanical problems
More severe injuries when thrown off bike
Bicycle InjuriesAcute Acute injuries in off-road bicycle riding
& racing Majority of injuries are acute, traumatic
injuries involving the extremities Hand Wrist Lower arm Shoulder Ankle Lower leg
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing Handlebars
Abdominal injury Handlebar hernia
Pelvic Genital injury
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing Abrasions most common injury
Contusions/bruises Lacerations Sprains
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing Fractures
20-30% Clavicle Fingers/metacarpals Scaphoid Colles/Smith/Barton Radial head/neck
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing Dislocations A-C separations Concussions
3-12% Head and face injury
Dental injury & fractured teeth
Bicycle InjuriesAcute Acute injuries in off-road bicycle
riding & racing Off-road riders sustain more fractures,
dislocations and concussions that their road event counterparts
Bicycling InjuriesAcute Abrasions and Contusions
60-70% of injuries May include exposed bone Forearm Greater trochanter
Bursitis Lateral thigh
Bicycling InjuriesAcute Abrasions and Contusions
Lateral knee Lateral leg and malleolus Medial malleolus from crank arms Medial leg from chain rings Torso and back
Bicycling InjuriesAcute-Treatment Road-rash
3-grades Clean area frequently Topical antibiotics Cover with dressing
Bicycling InjuriesAcute Neurologic injuries and deaths
Alcohol is a contributing factor Skull fractures Intracranial injuries
Brain contusion Most common fatal injury Frontal lobe Temporal Lobe
Spinal injuries
Bicycling InjuriesAcute Head injuries (1040 ER visits)
4% helmet wearers 11% of non-helmet wearers 18% involving motor vehicles 7% not involving motor vehicles
Bicycling InjuriesAcute Thermal injury
Hypothermia Hyperthermia
Heat cramps Heat exhaustion Exertional heat injury Heat stroke
Layering clothes Acclimatization
Bicycling InjuriesAcute Dehydration
1-bottle every 20 minutes Camel-back
Glycogen depletion-Bonking Eat every 15 miles
Electrolytes Altitude sickness Sunburn Cardiovascular
Bicycling InjuriesAcute-Treatment Prevent further injury to rider ABC’s
Airway Breathing Circulation
Active bleeding Neck-spinal injury Fractures & dislocations
Bicycling InjuriesAcute-Treatment Call for help-911
Unable to sit up Hospital visit Family contact Return of bicycle
Bicycling InjuriesRehabilitation Modify training program PRICEM
Protect Rest Ice Compression Elevation Medication
Bicycling InjuriesRehabilitation Strengthen
Quads Hamstrings Gluteals Calves
Bicycling InjuriesRehabilitation Stretching
Gluteals Quads Hamstrings Calves TFL & Iliotibial band Iliopsoas Hip adductors
Bicycle Training Techniques Protect from cold or hot weather Proper warm-up & cool-down Adequate hydration and nutrition Monitor mileage, frequency,
intensity Limit weekly mileage increase to
10%
Bicycle Training Techniques Low pedal resistance High cadence 80-100 pedal rpm Frequent change in position
Hands Head & Neck
Bicycle Training Techniques Stretching exercises
During ride After ride Neck Calves/Hamstrings Quads/Hip adductors
Strengthening exercises
Conclusion History Hardware Biomechanics Evaluation and Treatment of Injuries
Acute Overuse
Training Techniques
Thank-You