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Katrina Hodgson, NASM CPT, BS Health Science, has helped thousands reach their goals by designing fitness programs with her workout videos and her website ToneItUp.com. As one of Diet.com’s featured personal trainers she hopes to share her passion for fitness and continue to make a positive impact for the Diet.com community.

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Fitness Expert Katrina
by Katrina Hodgson, Diet.com Fitness Expert

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“Now squeeze your tricep… and engage your core!”

This is something typical you may see in a description of an exercise in a magazine or a video. We all know that form is very important during your workouts, but if the words do not match up to the correct muscles then you can get hurt!

I have put together a list of terms so you can better understand your home workouts, the exercises you need to do properly, where you are supposed to feel them and what is going on with your body.

You may know many of them, but it is important to know all of them.

Abdominal muscles: Your abs! Simply put, but these are the muscles that allow you to move your torso around and flex your spine.

Aerobic: Exercise that requires oxygen! An example of this could be jogging at a comfortable pace for a long period of time. Other examples could be swimming, an aerobics class, walking or cycling. If you're performing any exercise for more than 30 seconds it is called aerobic.

What we don’t hear very often is the term anaerobic. This means exercise that does not need oxygen such as strength training or short bursts of exercise lasting just a few seconds.

Biceps: The muscles on the front of your arm running from your elbow to your shoulder! These muscles flex your arm.

Body Composition: The ratio of fat free mass and fat mass in your body.

BMI: Body Mass Index. A way to asses your appropriate weight according to your height quickly. This does not take muscle weight into account.

Calves: The muscles in the back of your lower leg that run from your ankles to your knees.

Cardiovascular Fitness! This simply means the health of your heart.

Circuit training: A series of exercises performed one after another with minimal rest!

Concentric: When your muscle exerts more force than is being placed on it. The muscle shortens. For example on the way up during a bicep curl.

Core: The muscles in you abs, lower back, hips, glutes, obliques, and some muscles of the upper back and legs.

Cross Training: Incorporating a variety of exercise into your workout program to avoid injury and/or boredom. This could mean running, cycling, swimming, walking, and the elliptical.

Delts or Deltoids: The shoulder muscles! ...    Continue

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@ 11:33pm ET on June 13, 2010 Hi Katrina, and thanks for the mini glossary. You didn't mention the tabata interval method. I would like to know if this is considered anaerobic exercise as it is done in spurts of intense exercise lasting no more than twenty seconds followed by 10 seconds of rest. How do you classify that?
Thanks,
--Ana--
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