I have recently learned of a great new piece of kit called the Alter-g Treadmill.  This proves to be one of the most important developments in lower limb injury prevention and rehabilitation in recent years. Originally developed by NASA to help astronauts exercise in space, the unique technology allows clients to run, walk, perform static or dynamic exercises at precisely controlled percentages of their body weight (between 20-100%). This allows individuals who have restricted weight-bearing post-injury or surgery, to maintain their neuromuscular patterning, control and cardiovascular training, whilst their body-weight is off-loaded safely and measurably by an inflatable chamber over a treadmill.  The benefits of this early mobilization are evident and its what was used by runner Paula Radcliff when she insisted on continuing training despite having stress fractures. Anyone interested please let me know via the contact form.