1. Team Sports
1.1. Soccer
1.1.1. Positions
1.1.1.1. Striker
1.1.1.2. Midfielder
1.1.1.3. Defender
1.1.1.4. Goalkeeper
1.1.2. Major Leagues
1.1.2.1. Premier League (England)
1.1.2.2. La Liga (Spain)
1.1.2.3. Serie A (Italy)
1.1.2.4. Bundesliga (Germany)
1.1.2.5. Ligue 1 (France)
1.2. Basketball
1.2.1. Positions
1.2.1.1. Point Guard
1.2.1.2. Shooting Guard
1.2.1.3. Small Forward
1.2.1.4. Power Forward
1.2.1.5. Center
1.2.2. Major Leagues
1.2.2.1. NBA (USA)
1.2.2.2. EuroLeague (Europe)
1.3. Baseball
1.3.1. Positions
1.3.1.1. Pitcher
1.3.1.2. Catcher
1.3.1.3. First Base
1.3.1.4. Second Base
1.3.1.5. Third Base
1.3.1.6. Shortstop
1.3.1.7. Outfield
1.3.2. Major Leagues
1.3.2.1. Major League Baseball (USA)
2. Extreme Sports
2.1. Skateboarding
2.2. Surfing
2.3. Rock Climbing
3. Health & Fitness
3.1. Training & Conditioning
3.2. Nutrition
3.3. Injuries & Prevention
4. This structure illustrates a sports-themed mind map with a hierarchy reaching into four levels of detail. Keep in mind that this is only a basic structure and can definitely be expanded upon further for a more extensive mind map.
5. Individual Sports
5.1. Tennis
5.1.1. Singles
5.1.2. Doubles
5.1.3. Major Tournaments
5.1.3.1. Australian Open
5.1.3.2. French Open
5.1.3.3. Wimbledon
5.1.3.4. US Open
5.2. Swimming
5.2.1. Styles
5.2.1.1. Freestyle
5.2.1.2. Butterfly
5.2.1.3. Backstroke
5.2.1.4. Breaststroke
5.2.1.5. Individual Medley
5.2.2. Major Events
5.2.2.1. Olympic Games
5.2.2.2. World Championships
5.3. Golf
5.3.1. Types of Clubs
5.3.1.1. Driver
5.3.1.2. Putter
5.3.1.3. Iron
5.3.1.4. Wedge
5.3.2. Major Tournaments
5.3.2.1. The Masters
5.3.2.2. US Open
5.3.2.3. The Open Championship
5.3.2.4. PGA Championship