Runners training for a marathon can get a stress fracture if they. escalate their training too quickly. Stress fractures occur when too much weight or stress is put on a weakened bone. It's often the result of an imbalance in bone health caused by actions that outpace the body's natural bone rebuilding process. See Stress Fracture Risk Factors.
Definition of MDF (Medium-Density Fiberboard) Medium-density fiberboard (MDF). Definition. Medium-density fiberboard, or MDF, is a manufactured (engineered) wood product composed of wood fibers that are mixed with resin and wax and pressed into flat panels under high temperature and pressure. It is used much like plywood as a building material in residential and commercial construction.
Medium Density Fibreboard (MDF) is a wood substitute form which is made from fine wood fibres in a resin which is bonded under heat and pressure.DF may be used instead of plywood or chipboard. It is dense, flat, stiff, has no knots and is easily machined. It is made up of fine particles and therefore does not have an easily recognisable surface grain. Can be obtained in natural colour in various thicknesses or self coloured.