Category: I

  • Inversion

    Turning the sole of the foot inward or medially. Applied to sucrose, means its hydrolysis to glucose and fructose (invert sugar). A turning inward, as of the eyelid or the foot. The fact of being turned towards the inside. Abnormal condition in which an organ is turned inward or inside out (e.g., the uterus after…

  • Intrinsic reinforcement

    Motivation resulting from the activity itself being the reward.  

  • Interval training

    Consists of harder bouts of exercise (work cycles) interspersed with easier bouts of exercise (recovery cycles). An aerobic and/or anaerobic workout that consists of three elements: a selected work interval (usually a distance), a target time for that distance, and a predetermined recovery period before the next repetition of the work interval. Alternate periods of…

  • Internal locus of control

    Belief that one is personally responsible for what happens and for the outcomes in their own life. A person’s belief that he or she, not outside forces or other people, is largely responsible for what happens to him or her in life. A general disposition to expect that one’s actions will lead to predictable outcomes…

  • Internalization

    When a person is engaging in an activity for self-fulfillment; when reached, compliance is likely to occur. The process whereby moral codes are adopted by the person so that they control his or her behavior even when there are no external rewards or punishments. Unconscious process of adopting and absorbing the beliefs, values, and attitudes…

  • Intermittent exerciser

    A person who does not maintain a regular and steady exercise schedule; they enjoy exercise but have difficulty committing the time. Activities performed with alternate periods of intense physical activity interspersed with varying periods of rest. A physical training routine characterized by the discontinuation and resumption of exercises in a cyclic and alternating manner.  

  • Intermediate transition

    A transition that changes planes or switches between one- and two-footed moves without passing through neutral position.  

  • Intensity of training

    Intensity of training

    An objective or subjective measure of how hard an individual is exercising.  

  • Integumentary system

    The largest organ system; includes the skin and all structures derived from it, including the hair and nails. Skin and its appendages: nails, hair, sebaceous glands. The skin and its derivatives (hair, nails) and the subcutaneous tissue. The skin and its accessory organs, such as the oil and sweat glands, sensory receptors, hair, and nails;…

  • Instinctive drowning response

    Refers to the characteristics of drowning and the inability of a person in distress to call or wave for help and the short time period before submerging.