COBMITT Cycling Gloves

Cycling results in significant injury to the wrist.  The 2 nerves frequently damaged are:

  1. Ulnar nerve at Guyon`s Canal
  2. Median nerve at the Carpal Tunnel

Prevention of injuries can be achieved by using gel gloves. The current marketplace for cycling gloves is poor and fails to achieve prevention of these common injuries due to a failure to understand the variations in anatomy.

Dr Conor O’Brien, who is a medical expert in Sports Medicine and Electrodiagnostic Medicine and has published widely on the subject, has created a design to correct this deficiency.

Anatomy of Guyon’s Canal

Guyon Canal is about 4cm in length and housed by four borders. The roof consists of the volar carpal ligament. The floor is made of the transverse carpal ligament.

The radial border has the hook of the hamate, and the medial border is composed of the pisiform bone along with the pisohamate ligament.

Inside this canal runs the ulnar nerve and artery. The ulnar nerve enters the canal as a mixed sensory and motor nerve. As it travels through it, the nerve splits into superficial sensory and deep motor branches.

Each part of the ulnar nerve which is affected within Guyon Canal region is represented by a particular zone and gives its unique constellation of symptoms.

Normal Anatomy

The Guyon canal is situated between the pisiform and the hook of the hamate in the proximal hypothenar region (Figure 1). The lateral wall boundaries of the canal are the hook of the hamate, the transverse carpal ligament, and the flexor tendons.

Handlebar palsy is the compression of the ulnar nerve at Guyon`s canal by the handlebar, resulting in the common syndrome of pain, weakness in finger function and loss of sensation in the 4th and 5th fingers.

Carpal Tunnel Anatomy

The carpal tunnel is an osteofibrous canal situated in the volar wrist. The boundaries are the carpal bones and the flexor retinaculum. In addition to the medial nerve, the carpal tunnel contains nine tendons: the flexor pollicis longus, the four flexor digitorum superficialis and the four flexor digitorum profundus.

The width and depth of the carpal tunnel are 19.2 ± 1.7 and 8.3 ± 0.9 mm, respectively, and the width to depth ratio is 2.3 ± 0.2. The tilt angle is 14.8 ± 7.8°. The tilt angle changes significantly along the length of the carpal tunnel, rotating away from the radial aspect of the hand distally (mean range 8.2–16.2°, p < 0.001). To accommodate these variables the pressure pad for the median nerve at the Carpal Tunnel must be a minimum of 3 mm long, and have a tilt angle of 25-30 degrees.

Current modern gel gloves that are manufactured for injury prevention in cyclists fail to understand the true anatomy of this canal and the canal of Guyon and do not act properly as an extrinsic prophylactic agent.


Dr O’Brien, with over 30 years of knowledge of these 2 injuries, has designed a glove that corrects this deficiency:  The COBMITT glove   protecting the median and ulnar nerves, the Carpal Tunnel and Guyon’s Canal.