The lexicon of muscle-building, and training - Part 10

A rest interval is taken between circuits.

The balance of muscle-building, strength, and cardiorespiratory conditioning produced from circuit training depends on how the weights, rep counts, sets, rest intervals, and progression scheme are arranged.


Cyclical ketogenic diet. Although the CKD is primarily about percentages (approximately 25% to 35% protein, 5% carbohydrates, and 60% to 70% fat), and typically includes a one- or two-day, high-carb phase each week, there's more to it than that. How you produce the percentages plays a huge role in the effect of the diet on your body and health. If you get most of your fat from fried food, over-cooked meat, cured and processed food, scrambled and fried eggs, margarine, refined vegetable oils, and junk food, the effect on your health will be different from if you got your fat from healthy sources, even though the overall percentages of macronutrients may be the same in both cases.

Two further potential problems of a CKD schedule are insufficient micronutrient and fiber intake. Generally, a CKD is more suited to fat loss than it is for overall gaining, and is a short-term regimen only.


The collar bone.


The lifting of a weight from the floor to the shoulders in one continuous, rapid manner. It requires skilled, coordinated strength of the legs, thighs, back, arms, and shoulders.

Clean and jerk

One of the two Olympic weightlifting events, where the weight is lifted from the floor to the shoulders, and then from the shoulders overhead — a two-part, highly skilled lift. The other Olympic lift is the snatch.


The small, triangular bone that forms the lower extremity of the spinal column in humans. It's formed from the fusion of three, four, or five (usually four) rudimentary coccygeal vertebrae.


The primary protein in connective tissue, cartilage, bones, tendons, and skin.


Cylindrical metal clamps, and quick-release springs, used to hold weight plates securely in position on a barbell or dumbbell. Inside collars are usually fixed, to keep the plates from sliding inward. Outside collars keep the weight plates from sliding off the ends of the bar, and are usually adjustable.

Compound exercises

Exercises come in two basic types: multi-joint movements, which are often called compound exercises, and single-joint ones, which are often called isolation exercises. The squat is a multi-joint exercise because it involves movement at more than one joint, and hence affects a lot of musculature — primarily the thighs, buttocks, and lower back.

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