To train in any level of Gravity you must know a certain level of gravity training as well have a certain power level. To improve your level of Gravity training you simply must spend a session (7 days) training in a level of gravity. After this session your gravity training level will increase and you can then boost the gravity up to your next level.

Gravity Training Level 1: Acquired after training in 10x gravity or less. Allows you to train up to 25x gravity. Once you reach this level you will only gain +2 all stats (+8 ki, +16 pl) for training in 10x gravity or less.

Gravity Training Level 2: Acquired after training in 10x - 25x gravity. Allows you to train up to 40x gravity. Once you reach this level +6 all stats (+24 ki, +48 pl) for training in 10x - 25x gravity.

Gravity Training Level 3: Acquired after training in 30x - 40x gravity. Allows you to train up to 55x gravity. Once you reach this level +15 all stats (+60 ki, +120 pl) for training in 30x - 40x gravity.

Gravity Training Level 4: Acquired after training in 45x - 55x gravity. Allows you to train up to 85x gravity. Once you reach this level +25 all stats (+100 ki, +200 pl) for training in 45x - 55x gravity.

Gravity Training Level 5: Acquired after training in 60x - 85x gravity. Allows you to train up to 120x gravity. Once you reach this level +35 all stats (+140 ki, +280 pl) for training in 60x - 85x gravity.

Gravity Training Level 6: Acquired after training in 90x-105x gravity (2 sessions). Once you reach this level +45 all stats (+180 ki, +360 pl) for training in 60x - 85x gravity.

*You will still gain stats from gravity on planets regardless of level.