Hi mate, medicals can involve many different things. It really depends on the players age and how much the player has played in the last 12months. A medical normaly starts with blood tests and urine samples, to test for any use of drugs or banned substances. After this the player undergoes some physical tests such as weight lifting and push/pull tests. Then is aerobic excersices to measure heart rate and blood presure at high performance so the medics can gauge the overall fitness of a player and so can make an assumption as to if the player can continue at high performance through a whole season or wether or not the player will need a new regime/routine. Whilst that info is being analysed player goes through rigirous checks by independant doctors on all muscles and ligaments to see if any damage is detected. Cat scan is used for this. This is the process in a nutshell as to type out the whole thing would take me ages. The whole process takes around 12 hours but as I said before can take longer due to players age etc. Someone like RSC with a history of injurys could take a lot longer than a signing such as Gareth Barry as he has played a full season and has a good medical history so the medical would not be as rigorous. Hope this helps