You aren't sure exactly what to do.

Don't worry: You don't need to use complicated machines or the most complex routines to break a sweat. Master these classic moves, then check out 5 Reasons NOT to Be Intimidated by the Weight Room.

Your muscles are super sore.

Yes, you'll feel sore for the 24 to 48 hours after your workout (blame an increase of lactic acid and cell breakdown). The good news is that you'll feel less sore the more you exercise. Until then, think of it as proof of productivity.

You fall asleep the second your head hits the pillow.

As you exercise, you'll need more sleep to recover. So you can tell those sheep you won't be needing their assistance for a while.

You're hungry. All. The. Time.

When you build muscle mass, you burn more calories even when you aren't working out. To keep up with the deficit, increase your protein and carbohydrate intake so your body can refuel properly. (Sorry, that's not a free pass to eat an entire pizza.)

You hit a wall.

Try varying your workout or exercising with a buddy when you're feeling unmotivated, and approach your workout as a lifetime commitment—not just a quick fix.

You're more confident.

Beginning an exercise routine can make your confidence skyrocket. You can thank feel-good endorphins—and the fact that you're reducing your body fat and increasing lean muscle.

You're less stressed.

Exercising and the subsequent increase in sleep will reduce your stress levels. A hard workout is a great way to release aggression and increase the quality of your daily life.

Your doc hearts you.

Incorporating cardio into your new workout routine will help improve your heart health and cholesterol levels.

You're BFFs with your water bottle.

It's recommended you drink half your body weight in ounces of water every day, but you need to increase that number when you work out. Properly hydrating gives muscles the best environment to improve. So don't be surprised if a water bottle becomes your new favorite accessory.

By Shannon Bauer

Source: FitnessMagazine