Introduction to exercise
After all that talk about the importance of diet, why exercise? Because, while it isn't as important as diet, it is still pretty hugely important to your overall health and fitness.
- Exercise determines HOW you gain or lose weight, and your body composition generally. You can diet down to, say, 120 pounds. But do you want to be 120 pounds of sleek, sexy muscle, or 120 pounds of gross, flabby loser? Exercise largely dictates the outcome.
- Exercise burns calories, which makes it easier to lose weight in conjunction with diet.
- Exercise promotes strength, endurance, and resistance to injury and illness, all of which are pretty great in and of themselves.
So exercise makes it easier to lose weight, and plays a big role in the composition of your body. There are two main kinds of exercise, cardiovascular (aka cardio, aerobic, etc.) and weight lifting (aka weights, lifting, resistance training, etc.)
Cardio: Any type of exercise that sustains an elevated heart rate consistently for a long period of time, such as running, cycling, or elliptical machine
Weight lifting: Pretty self explanatory, you push around heavy weights.
Cardio vs. weights
For most people, meeting their fitness goals requires that they do some of both, not one or the other.
I'm going to start with the case for weight lifting, because it seems to have the most misconceptions associated with it.
Are you trying to lose weight? Lift weights. Lifting burns tons of calories, and lifting weights while dieting will cause you to retain more muscle and lose more fat than just diet and/or cardio. Because the name of the game when it comes to not looking awful is FAT LOSS, not weight loss. Do you want to be that guy who loses lots of weight and still looks flabby and useless? Of course not.
Are you just trying to "tone up"? Lift weights. "Toning" is kind of a nonsense term, because you don't actually "tone" anything. You can only lose fat and gain muscle, and lifting weights helps you do both, by burning calories and promoting muscle growth. Like I said before, you get huge by eating huge, not lifting weights; lifting just determines how much of your weight is muscle vs. fat.
Are you a woman? Lift weights, because I already explained why lifting won't turn you into a man, and all the other benefits still apply to you. And if you are a 1 in 1,000,000 woman who can pack on muscle mass like a man, just stop working out as hard and it will go away.
Lifting weights makes you stronger and healthier, improves your posture, makes you less injury prone, and strengthens your bones(making it especially important for the elderly and for women). Additionally, it speeds up your metabolism even while you rest - more than cardio by itself.
But what about cardio? Cardio is good for everyone because it improves your overall endurance and ability to exert yourself over an extended period. It promotes cardiovascular health and contributes to increased bone density. Additionally, it pretty much makes everything else function better: cardio helps stabilize hormone levels (increasing testosterone and increasing insulin sensitivity), improves endurance and recovery, helps the body fuel calories away from the fat cells and into the muscle, helps with weight maintenance/preventing the "yo-yo effect", generally keeps you healthy, and finally burns calories.
My suggestion is to alternate weights and cardio, for instance doing 3 days of weights, 2 days of cardio, and taking the other 2 days off. Doing both on the same day tends to cause one or the other to suffer from reduced effort, and generally burns people out.




