Claudication describes pain brought on by walking, that some people with peripheral vascular disease in the legs and feet develop. This pain can be a crushing pain as felt in angina of the heart, but in the calf muscles (and other leg muscles).
It can also manifest as numbness or pins and needles in the feet. This particular condition is always brought on by exertion (eg walking 50 meters) but reduces quickly when the patient stops the exercise.
Cliff at NCP has completed a Master of Science in this field and has developed specific procedures for testing patients for this condition. Cliff runs workshops for his Podiatry colleagues on this very topic.