In response to many people's interest in the topic of life force/life energy/life span, especially after seeing Big Mom taking away 40 years of life span from her son which eventually killed him, I wonder if there is any "cure" to such phenomenon when another cower person/people were to face Big Mom's wrath again. I also wonder if Dr Chopper's "doctoral instinct" would be triggered to stimulate his interest on such a topic. Other scientists such as Dr Vegapunk may probably would, particularly in areas of devil fruits in relation to its users. But if Chopper takes his interest in medicinal science, it may actually become a scientific breakthrough of a cure.
We don't know what kind of research Chopper does though we do know his goal is to become a doctor who can cure any diseases. Besides the general researches on invention of medicine for cure and treatment of diseases, there is a possibility that he is on preventive medicinal cure. That is to say that he may invent methods, in line with his medical knowledge (which I think he is and should be in constant improvement of himself as a doctor), to stablise the haki state, or prolong the duration of usage, so as to prevent a person from suffering an over-exhaustion when haki is used. Concurrently, since haki originates from the life force (or energy), the newly invented medication may actually help his crewmates like Luffy. In other words, Luffy may be able to use his Gear Fourth more efficiently during battles, while maintaining a stable condition of his life force.
Another alternative way of looking at it is on the haki users. In the case of Luffy, his Gear Fourth consumes a lot of energy (haki) and once his energy depicts, his Gear automatically deactivates. But if he uses his ability more often, he may eventually get better at it. It's like the more we exercise (say jogging), the better our stamina improves. It does seem like Luffy gets better at his abilities (such as his Gears) over time as he constantly practising them during battles. If this is so, his life energy probably will not get affected as much as it would seem so over time. Assuming Dr Chopper is running his study on the similar subject and gains success at it, Luffy and many of the Straw Hat members who depend on their life force as a source of their haki, when it's coupled with their gradual experiences in battles, will benefit greatly.
We don't know what kind of research Chopper does though we do know his goal is to become a doctor who can cure any diseases. Besides the general researches on invention of medicine for cure and treatment of diseases, there is a possibility that he is on preventive medicinal cure. That is to say that he may invent methods, in line with his medical knowledge (which I think he is and should be in constant improvement of himself as a doctor), to stablise the haki state, or prolong the duration of usage, so as to prevent a person from suffering an over-exhaustion when haki is used. Concurrently, since haki originates from the life force (or energy), the newly invented medication may actually help his crewmates like Luffy. In other words, Luffy may be able to use his Gear Fourth more efficiently during battles, while maintaining a stable condition of his life force.
Another alternative way of looking at it is on the haki users. In the case of Luffy, his Gear Fourth consumes a lot of energy (haki) and once his energy depicts, his Gear automatically deactivates. But if he uses his ability more often, he may eventually get better at it. It's like the more we exercise (say jogging), the better our stamina improves. It does seem like Luffy gets better at his abilities (such as his Gears) over time as he constantly practising them during battles. If this is so, his life energy probably will not get affected as much as it would seem so over time. Assuming Dr Chopper is running his study on the similar subject and gains success at it, Luffy and many of the Straw Hat members who depend on their life force as a source of their haki, when it's coupled with their gradual experiences in battles, will benefit greatly.
