Fast Twitch Muscle Fiber:
This is a type of muscle fiber with fast contractile characteristics that has a low capacity to use oxygen. These fibers are the first to be used in short sudden bursts of activity.
Fat Free Weight:
Your bodies weight free of fat; often called lean body weight.
Fat Weight:
The absolute amount of body fat.
Flexibility:
The range of movements of a specific joint and of its corresponding muscle groups.
Flexors:
These are the muscles that decrease the angle at a joint. For example, the hamstrings flex the knee (bend it).
Frequency:
This is the number of workouts. Frequency should be adjusted to the intensity and duration of the workouts to reach a training effect
Fascia Fibrous connective tissue that covers, supports and separates all muscles and muscle groups. It also unites skin with underlying tissues.
Fat Often referred to as lipids, or triglycerides, one of the main food groups, containing nine calories per gram.
Fibrin The substance that in combination with blood cells forms a blood clot.
Flex Bend or decrease angle of a joint; contract a muscle.
Flexibility (ROM) Range of movement in a joint or group of joints.
Flexion Bending in contrast to extending, as in leg flexion.
Flush Cleanse a muscle by increasing the blood supply to it, removing toxins left in muscle by exertion.
Forced Repetitions Assistance to perform additional repetitions of an exercise when muscles can no longer complete movement on their own.
Free Style Training Training all body parts in one workout.
