Most teams start pre-season practice in the summer to get ready for the season. Club sessions often take place three days a week for one to twelve hours. Every day, school teams practice. Practices will often include athletic endurance, hill running, speed training, pacing, racing strategies, and other activities. During the season, schools may have additional practices or races. For example, if a team is doing well early on but starts losing games later in the season, they might have a post-season practice or race. At the end of the season, most club teams have a final championship race that determines both the overall men's and women's winners of the year. This is usually a race between the two leaders from each stage of the season plus any others that were invited to participate. For example, if there were four participants at the beginning of the season who finished in the top eight, then they would all come back for this final race. These final races can be very competitive - especially if the season has been long and hard-fought - so many clubs invite their strongest competitors to post-season events to keep themselves motivated during the off-season. In addition to these official championships, some individuals or teams decide to hold unofficial races either to see who is best against all others or just for fun.