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Getting Started continued...

"I can't tell you how many people I see with a knee injury because they were not taught correctly how to do a lunge or squat," says Sue Carver, physical therapist with A World of Difference Therapy Services in Little Rock, Ark.

Siebers also recommends checking out books, videos, and/or fitness- and health-related web sites for guidance on exercises and form.

Indeed, good technique, not heavy lifting, should be your primary goal in the beginning, Carver says.

Siebers recommends using a heavy enough weight to feel resistance, but not strain or pain. Your individual body will determine just how much that is, and you should err on the light side at first; five pounds may not seem like a lot, but it's better to be conservative than suffer.

And how much should you work out? According to the American College of Sports Medicine guidelines, beginners should do at least two days per week of any type of strength-training exercise. Your workout should consist of 8 to 12 repetitions each of 8 to 10 different exercises working all the major muscle groups -- chest, back, shoulders, arms, abdominals, and legs. (A repetition is how many times you lift the weight, pull the rubber tubing, do a pushup, or whatever.)

Machines or Free Weights?

Both free weights and weight machines work well, and experts say there's no evidence that one is superior to the other, so this is largely a matter of choice.

"Internet chat rooms and support groups really help to motivate."

Machines are a good idea for people who are overweight and/or out of condition, since the exercises are generally done seated and with back support, Seibers says.

But if machines are not an option, investing a few dollars in a set of light dumbbells and/or some resistance tubing can give you what you need to start toning those muscles.

Whichever option you choose, keep your moves basic at first, the experts say. For the arms and upper body, try these exercises:

  • Chest presses
  • Reverse flies for the back
  • Overhead presses for the shoulders
  • Bicep curls
  • Triceps kickbacks or extensions

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Ensure you're exercising hard enough to get a good workout, but not strain your heart.

While you are exercising, you should count between...

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