Training is performed in groups of 3 players. The amount they develop changes depending on the kind of training and type of player.
There are 6 kinds of training, each associated with one player stat (Stamina, Spirit, Power, Speed, Tech, Coach). A training will increase the associated stat the most than other stats. Furthermore each training has 5 level for a total of 30 kind of trainings. The higher the training level, the higher stats it can train to players.
All trainings uses Practice Points, with the exception of Coach Trainings that uses Idea Points instead. The amount of points used depends on the training level. Higher level training will cost more points.
To upgrade a training level, first the training must be contiunally used to gain xp. After prompted that the training can be upgraded, spend Idea Points to upgrade the training to the next level. The amount of Idea Points required to upgrade depends on the current training level.
The numbers listed in the tables is the number of arrows that's shown in in-game training effects. The higher it is, the more high the maximum amount a stat can be trained.
Tennis Club Story Guide ✍
Practice Points, with the exception of Coach Trainings that uses 
Idea Points instead. The amount of points used depends on the training level. Higher level training will cost more points.
