If you're starting to exercise more and want to ensure that you're getting the nutrition you need, chances are you're going to focus on adding carbohydrates to ensure you have the energy stores your body needs. This concept isn't wrong; carbohydrates are the body's preferred fuel source. However, there's a lot of misinformation out there that could make your exercise (and weight loss, if you're aiming for that, too) become a little rockier.
One Size Does Not Fit All, and Advice Should Come From a Dietitian
Carbohydrate use in your diet follows some general truths that fit most people, such as carbs being a preferred fuel source, as mentioned. However, all carb advice is not suitable for every person. For example, if your trainer at the gym has told you that you need to up your carb intake to a good 400 grams per day or more, that might be appropriate for someone training relentlessly for marathons who has a history of burning off carb stores very quickly. But if you're doing a beginner's workout and are already battling pre-diabetes, for example, that's terrible advice. You must find the plan that fits your needs, your health history, and your body's tendency to change as your diet and exercise regimens change. If you find that a low-carb diet works better for you, for instance, then you need to find a plan that fits that requirement.
Along with finding your plan comes finding that plan through a registered dietitian. You can consult one personally or look for websites that get their nutrition information from registered dietitians. "Nutritionist" is a general term with no real legal meaning in the United States. This does not mean that no one else could ever know what they are talking about. But before you accept nutrition advice from just anyone, research it and see what dietitians are saying about it (keeping in mind that you'll almost always find a divided community, but go with the research).
Like Exercise, Start Slow
Regardless of whether you're just tweaking your current daily diet or changing to a completely new regimen, start slow. Don't make sudden huge changes. For example, if you start adding a lot more carbs, you could experience bloating or even some odd energy changes as your body tries to figure out what to do with this sudden influx. If you switch to a ketogenic diet, known for its low carb limits, you could experience "keto flu," that hazy, weird feeling that some people get as their body adjusts to burning fat instead of carbs for energy. Make the transition slowly, though, and your body will have an easier time making that switch.
Consult with a registered dietitian to find a good plan; if what the dietitian suggests does not make you feel healthy (or makes fitness seem like more of a struggle, and so on), find another dietitian to look at other plans. Everyone is different, but everyone does have an optimal diet. It's just a matter of time before you find yours. Go to site for more information.