After a game, a player is awarded or penalized skill points based on performance relative to the computer's skill level, though some games do not calculate points during multiplayer sessions. The game keeps track of these points by charting them on a graph, as well as increasing the size of the crowd in Tennis and Boxing single-player modes. After obtaining 1000 skill points in a sport, a player is awarded "pro" level, along with a cosmetic feature for their Mii in Bowling and Boxing. A Mii newly turned pro will receive a message on the Wii Message Board notifying them. "Wii Sports" also features a fitness test that calculates a player's fitness age (ranging from 20 to 80 years old, 20 being the best possible). The test gauges the player's performance in three randomly chosen challenges in each test from the training mode that have been played at least once, and can only be taken once a day per Mii. Calculating the fitness age takes into account a player's balance, speed, and stamina. Fitness age results are graphed over one, two, or three months, with daily results posted on the Wii Message Board. The challenges from the fitness test are taken from another mode in "Wii Sports", the training mode. Training mode allows players to practice three challenges for each sport. In these challenges, players can earn medals by reaching certain scores. Medals range from bronze to platinum, bronze being the easiest, and platinum being the hardest.