SUMMARY
Objective. This study focused on the quantification of vibration which reaches the hands of motocross riders and on the reduction of such vibration thanks to the handlebar and handlebar mounts.
Background. Vibration transmitted through the hand and arm can lead to vascular and musculoskeletal problems that are well documented in the scientific literature. Controlled studies identifying plate-handlebar characteristics effects on the vibration attenuation in motocross are lacking.
Methods. We measured the vibration exposure of professional and recreational motocross riders on a motocross track and replicated the vibration patterns on a LDS V930 shaker in the laboratory, to analyze the effectiveness of various components in reducing the rider vibration exposure. Laboratory tests were performed with ten subjects randomly gripping different combinations of handlebars and steering plates, and questionnaires were used to evaluate the comfort. Objective measurements of vibration reduction were then compared to the subjective values of perceived comfort.
Results. According to the current EU legislation, the measured vibration levels reach the exposure limit in less than 1h. The mechanical characteristics of the handlebars and steering plates have a limited effect on the vibration transmitted to the rider’s hands. The rubber elements that many manufacturers use to reduce the vibration have limited effects at frequencies that are harmful for the musculoskeletal system. Questionnaires results have no correlation with the measured plate and handlebar performances.
Conclusions. Most of the techniques used to reduce the hand-arm vibration exposure of motocross drivers are ineffective.
Hand-arm vibration in motocross: measurement and mitigation actions
M. Tarabini, N. Mauri, I. Gaudio, S. Cinquemani, A. P. Moorhead, R. Bongiovanni, F. Feletti
Original Article, 280-289
Keywords: Hand-Arm vibrations; transmissibility, handlebar, handlebar’s grip, motocross, riding comfort, steering plate, steering system,
Table of Content: Vol. 10 (No.2) 2020 April/June
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Systems & Methods in Extreme Sports Medicine
F. Feletti, A. P. Moorhead, O. Mei-DanEditorial, 154-155 -
Injury Patterns and Wilderness Medical Preparedness in BASE Jumping
J. W. Sieker, G. M. Vilke, M. S. Schongalla, O. Mei-DanOriginal Article, 156-164 -
Use of a Prospective Survey Method to Capture a Picture of Overuse Injuries in Kitesurfing
R. Paiano, F. Feletti, M. Tarabini, P. BuzzacottOriginal Article, 165-170 -
Injury Prevention in The Sport of Surfing: An Update
A. NathansonOriginal Article, 171-178 -
Injuries in Mountain Biking and Implications for Care
D.C. Fiore, K. M. Fellows, T. A. HennerOriginal Article, 179-191 -
Rodeo Injuries: The Role of Safety Equipment
C. R. Reisenauer, J. W. StonebackOriginal Article, 192-200 -
Current Trends in Sport Climbing Injuries after the Inclusion into the Olympic Program. Analysis of 633 Injuries within the years 2017/18
C. Lutter, T. Tischer, T. Hotfiel, L. Frank, A. Enz, M. Simon, V. SchöfflOriginal Article, 201-210 -
A Review of Head Injury and Impact Biomechanics in Recreational Skiing and Snowboarding
D A. Patton, A. S. McIntosh, B. E. Hagel, T. KrosshaugReview, 211-232 -
Tendon Injuries in the Hands in Rock Climbers: Epidemiology, Anatomy, Biomechanics and Treatment – An Update
V. Schöffl, I. Schöffl, L. Frank, T. Küpper, M. Simon, C. LutterOriginal Article, 233-243 -
Assessment of the Ultimate Actual Strength of Rock-Climbing Protection Devices: Extraction Tests in the Field and the Human Capability to Predict the Ultimate Strength
A. Manes, F. CadiniOriginal Article, 244-256 -
Practical and Conceptual Analysis of Wingsuit BASE Flight
A. Stöckl, J. Sieker, A. Westman, O. Mei-DanOriginal Article, 257-268 -
Altitude Training and Endurance and Ultra-Endurance Performance
M. MarzoratiMini - Review, 269-273 -
Accidents and Risk Related Behaviours in Downhill Mountain Biking in Regard to Trail Choice
A. Frühauf, M. Huter, E. Weiß, M. KoppOriginal Article, 274-279 -
Hand-arm vibration in motocross: measurement and mitigation actions
M. Tarabini, N. Mauri, I. Gaudio, S. Cinquemani, A. P. Moorhead, R. Bongiovanni, F. FelettiOriginal Article, 280-289 -
Review on Reported Concussion, Identification and Management in Extreme Sports
C. N. Seehusen, V. Mucci, K. E. Welman, C. J. Browne, F. Feletti, A. J. ProvanceReview, 290-299 -
Surgical treatment of muscle injury. A review of current literature and indications
A. Giai Via, G. Discalzo, F. Oliva, R. Matteotti, N. MaffulliReview, 300-308 -
Conceptualising Performance Enhancement in Extreme Sports: Combining Physiological and Psychological Perspectives
E. Monasterio, E. Brymer, I. StewartOriginal Article, 309-314 -
An Ecological Dynamics Perspective of Return to Play Decision-Making for Extreme Sport Athletes
J. Nyland, A. Smith, B. Pyle, O. Mei-DanOriginal Article, 315-324 -
Protective and Supportive Garments and Bracing to Enhance Extreme Sport Performance and Injury Prevention
J. Nyland, A. Cecil, R. Singh, C. Raj PandeyOriginal Article, 325-332 -
A Systematic Review of Smart Clothing in Sports: possible Applications to Extreme Sports
S. Scataglini, A. P. Moorhead, F. FelettiOriginal Article, 333-342