Term	Definition
Aerobic exercise	Exercise that involves repetitive motions, uses large muscle groups, increases heart rate for an extended period, and raises core body temperature (e.g., walking, dancing, swimming)
Balance training	Exercise that helps maintain stability during daily activities and other exercises, preventing falls. It can be static (e.g., stand on one leg) or dynamic (e.g., walk a tightrope), with hand support as needed
Exercise	Structured, planned, and repetitive physical activity with the intent of improving physical fitness
Flexibility or stretching exercise	Exercise that lengthens muscles to increase a joint's capacity to move through a full range of motion. Stretches can be static (assume position, hold stretch, then relax); dynamic (fluid motion [e.g., tai chi]); active (balance while holding stretch, then moving [e.g., yoga]); or a combination (proprioceptive neuromuscular facilitation).
Lifestyle modification	Use opportunities in a person's daily routine to increase energy expenditure (e.g., manually open doors, carry groceries, use stairs) and substitute active for sedentary leisure time
Physical fitness	The summation of four factors: cardiorespiratory endurance, muscle power, flexibility, and body composition
Power	How quickly a muscle contracts (e.g., quickly hoisting a grocery bag versus slowly lifting the bag)
Progressive resistance training	Exercise that requires muscles to generate force to move or resist weight, with the intensity increasing as physical capacity improves (e.g., strength training)