The imprest system is a form of financial accounting system. The most common imprest system is the petty cash system. The base characteristic of an imprest system is that a fixed amount is reserved, which after a certain period of time or when circumstances require, because money was spent, it will be replenished.
Stress fractures heal with time and rest. Athletes are advised to rest from any activity that caused the stress fracture for the 6-14 weeks that the fractures take to heal (ask your doctor how long your particular fracture will probably take to heal), or until pain-free for 2-3 weeks. stress fracture results from repetitive use injuries that exceed the ability of the bone to repair itself. Impact forces are transferred to the bones, causing microfractures that consolidate into stress fractures. Stress fractures occur in weight-bearing areas, commonly the lower leg (tibia) and foot (metatarsals).
The impact forces of running make our bones stronger, however, our bones can only adapt at a gradual rate. That is why you may get a stress fracture from increasing your mileage too quickly from 20 to 40 miles per week, but a few years later may handle 60 miles per week with no problems.