Category: F
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Flotation equipment
Equipment used in water exercise to maintain neutral buoyancy or assist with maintaining proper alignment.
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Flexion
Decreasing the angle at a joint or moving out of anatomical position. Bending of a joint between two bones that decreases the angle between the two bones. The movement of a body joint such that the angle about the center of rotation or fulcrum decreases: extension. Bending of a joint (e.g., the elbow) that causes…
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Flexibility
The ability of limbs to move at the joints through a normal range of motion. The range of motion in a joint or a series of joints that reflects the ability of the musculotendon structures to elongate within the physical limits of the joint. Ability to move a joint through the full range of motion…
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Flat bone
A flat bone is thin and generally flat, as the term implies. Examples are the cranial bones and the scapula.
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Femoral nerve
The largest branch of the lumbar plexus and originates from the ventral divisions of the second, third, and fourth lumbar nerves. A major peripheral nerve originating in the lumbosacral plexus. A nerve which governs the muscle at the front of the thigh. Main nerve of the anterior (front) part of the thigh, receiving sensory impulses…
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Feedback cue
Cues used to maintain an open line of communication between the instructor or trainer and the exercise participant.
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Fat-soluble vitamins
These vitamins follow the same absorption pathway as fats and are stored in fatty tissue. Excess amounts can lead to toxicity. The group of vitamins identified as A, D, E, and K and are soluble in animal fats: water-soluble vitamins. Vitamin able to dissolve in fats or oils. The vitamins that are soluble in fat…
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Fats
Total lipids including phospholipids. An essential nutrient. Lipids as a whole are referred to as fats. Lipids are a family of compounds that are soluble in organic solvents but not in water. Chemically, fats (or lipids) are substances that are insoluble in water but soluble in organic solvents such as ether, chloroform, and benzene, and…
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Fat mass
The quantity of adipose tissue in the body. The quantity of body fat, usually expressed as a percentage of total body mass. The total body fat. It can be measured with dual energy absorptiometry or bioelectrical impedance techniques.
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Fast-twitch muscle fiber
A “white” muscle fiber characterized by its fast speed of contraction and a high capacity for anaerobic glycolysis. Muscle fibers that have a high contractile speed are considered fast-twitch and are also known as type II fibers. Type II differ from type I fibers, which are considered slow-twitch. Type II fibers are typically classified based…