I go to the gym every day. 3 days water aeorobics 1 hour each. 2 days light weights for all body and 30 min. Rowing. Then in afternoon most days want to lay down and do nothing rest body. Always want desserts more than meals, so I do not eat too good. What vitamins could I take? Any suggestions to my lifestyle?
Are you a man or woman? If the latter, have you seen a doctor recently to determine if there's any iron deficiency or anemia involved? That can be a cause of low energy for women.
You can find some good suggestions on proper diets by doing online research. Lance Armstrong's site has brief but helpful suggestions. As to vitamins, it's hard to recommend them for someone about whom little is known. If you're older, you might need B-12, perhaps a B supplement with a multitude of other B vitamins. You might need a male or female multivitamin.
More about your health, medical issues and what kind of diet you've been eating would help provide better answers. If you want to focus on a natural diet, read up on organic foods, as well as learn which nonorganics are in the Dirty Dozen of foods with high levels of pesticides.
You might also consider going to the gym every other day, or cutting down your workout time; if you're low on energy, gym workouts will compound that. What kind of meals do you have before your work out? If they're high sugar meals, you probably know that they'll give you a temporary energy boost but also a plunge in energy. Better to have foods that provide longer term energy.
On the dietary front, I like my desserts too, one of the reasons I exercise is to earn them! I find that having healthier options that are easy can help you to stop reaching for dessert rather than dinner. Look into meals that can be prepared in big batches and refrigerated or frozen to easily reheat later, or keep on hand some of the better quality packaged dinners that are available. And make sure you are getting enough protein and drinking plenty of water.
Are you eating enough? Are you trying to lose weight? You need lots of whole foods (veggies, grains, beans, fruits). Less sugar. Just because you want sugar, doesn't mean you need to eat it. If I eat too much sugar (it's my vice of choice), it makes me sleepy, because your insulin level rises to process the sugar, then crashes. So you feel tired and sleepy. Instead of eating sugary foods, eat some watermelon or a piece of fruit and a big salad with some chickpeas or tofu for protein. I'm a vegetarian, so that's the lifestyle I recommend for healthy living.
You could take a one-a-day type vitamin to make sure you're getting everything you need. What do you typically eat in a day?
I agree with GardenArtist above about vitamin B12. Have your primary doctor run a blood panel on vitamins to see what you are missing, then just take those vitamins that you are running low on. I take B12 and also D. With the crazy weather, we are not outside enough to get the much needed vitamin D. I just can't take the heat any more.
Now a days I find if I have a home made salad, either for lunch or for dinner, I do feel better the next day. Romain lettuce with a variety of different nuts, sunflower seeds, pumpkin seeds, blueberries, grape tomatoes, kidney beans and already packaged chicken strips for salads is really good. I know sounds like a lot of things to carry to the kitchen counter, but once you start it becomes second nature :)
Also have a mid-morning snack and mid-afternoon snack, whatever you like [no, not Cheetos].... I like the Kashi bars. My favorite is Kashi Dark Mocha Almond. No, it doesn't taste like twigs and bark :)
And drink plenty of water.