WHILE IT MAY seem obvious, too many Americans still resist accepting the simple truth that daily exercise would likely do more to improve their health than a cadre of specialists or the latest pharmacological miracle drug.

That's right, and this activity can be something as simple as a 30-minute walk. And I don't mean power walking with weights in your hands - just walking at a rate that you can still talk comfortably.

Besides, you already know exercise can make you look younger and more fit, and improve your mood, too.

So what's stopping you?

I see you need more convincing. Here are three more reasons to get stared on this lifelong journey sooner, as opposed to later:

1. Exercise promotes weight loss: So you know that as little as 30 minutes a day can put you into the driver's seat to weight loss (and the real bonus, better health). The key is making it part of your daily routine.

Forget about being a weekend warrior - just keep it simple, and do it regularly. Research consistently shows the benefits of regular exercise, especially when trying to promote weight loss.

2. It's good for your ticker: Last time I checked, heart disease was still the No. 1 cause of death in the United States. Every 20 seconds, someone has a heart attack; every 60 seconds, someone dies from a heart attack. That certainly sheds light on the situation.

OK, so here are a few reasons why daily exercise is good for your heart: It reduces artery-clogging LDL cholesterol, lowers blood pressure, reduces stress, improves blood sugar, decreases blood clots and improves circulation. Do you need more evidence?

3. Beats stress and depression: It's common knowledge that exercise is by far one of the best ways to manage stress and depression.

Exercise can be your personal sanctuary, a moving meditation - your temporary vacation from the daily grind. After exercise, you'll feel renewed and rejuvenated - you'll be ready to take on the world!

Depression is also best managed with exercise, because it triggers a variety of hormones, like endorphins and opiates, that explode in your brain. This enhances your optimism.