GTA VI will opt for realism even when it comes to training. To use gyms, Jason and Lucia will have to become members. Additionally, they will be able to buy energy drinks to get temporary stamina bonuses. There will also be different exercises, such as weights and punching bags.

Furthermore, training will affect the characters' attributes. Strength will increase health, while cardio will improve stamina. Also, eating too much can lead to weight gain. If we stop training, we will also lose muscle mass.

We will even be able to control sleep and rest. These factors will also influence our character's performance.