Cycling works good enough
Depending on your conditions, you might also consider inline skating. Be careful though, I broke a finger while learning to skate so that was a 1 month surface interval
.
If getting out is not that much of an option, you might consider a fitness club, or getting your own stepper (or symilar machine). Also, consider machines that give you a mild but constant effort (like steppers) instead of those wonder-abs type of gadgets (I'm not sure those are very efficient for fitness/stamina).
With exercising, the important part is finding something you like (even walking daily helps improve your breathing rate, but for me skating made the biggest difference
); otherwise you can get bored and give up.
I use my skates to go to office daily (~5km in the morning and 5 in the evening); In the beginning I had to make two or three stops along the way or I became sick from effort.
Also, take lots of opportunities to cary scuba tanks (and use them
).
Regarding eating habbits, there are a lots of aspects to consider, each of them affecting your weight and energy levels.
For example, here are a few of them:
- never mix sweet stuff (and amidone rich stuff like potatoes, bread and rice) with other food (other food being anything else
).
(that means don't eat meat with potatoes or beans, but keep an hour or two between them).
- never eat late at night; if you are very hungry in the evenings, it's better to eat something around 7-8 PM.
- salads means for me "all you can eat" (not combined with anything else though).
- don't eat complex sweets (like cakes, or milkchocolate) but lean towards fruit, or bitter chocolate (no milk).
- in general, try to stick to simple foods and eat them separately (and with 1-2 hours break between them).
- Try to eat more in the mornings than in the evenings.
- try to avoid heavy meat and lean towards birds and fish since they don't give you that much of a drowsiness afterwards.
Better, ask for a doctor / nutritionist's advice. I am neither, so take what I told you with a grain of salt.