However, it should be remembered that the inflammatory or 'lag phase' is the first stage of the healing process and a degree of pain and loss of function may be helpful to prevent the athlete doing further damage to the injured part. The question of whether NSAIDs have an adverse effect on healing was examined by Obremsky et al (1994) and Almekinders (1986). Both studies showed no significant effect on tensile strength recovery following NSAID treatment for muscle strain injury, and Obremsky et al (1994) further demonstrated that muscular force was also unaltered. However, both studies showed histologic evidence of delayed healing with NSAID use, although it should be stated that both studies utilised animal models.
MP, also known as 6α-methyl-17α-hydroxyprogesterone or as 6α-methyl-17α-hydroxypregn-4-en-3,20-dione , is a synthetic pregnane steroid and a derivative of progesterone .   It is specifically a derivative of 17α-hydroxyprogesterone with a methyl group at the C6α position.   The generic name of MP is a contraction of 6α- me thyl-17α-hy droxyprogesterone . It is closely related to medrogestone as well as other unesterified 17α-hydroxyprogesterone derivatives such as chlormadinone , cyproterone , and megestrol .