TExES Health EC-12 (257)

Health-related fitness includes five components that contribute to overall health and functional capacity.

Cardiorespiratory endurance is the ability of the heart, lungs, and blood vessels to deliver oxygen to working muscles during sustained physical activity. It is assessed through tests such as the PACER (Progressive Aerobic Cardiovascular Endurance Run), one-mile run, and step tests. Improved cardiorespiratory endurance reduces risk of cardiovascular disease, diabetes, and certain cancers.

Muscular strength is the maximum force a muscle or muscle group can generate. It is assessed through tests such as grip strength, one-repetition maximum, and push-ups. Adequate muscular strength supports daily activities, maintains bone density, and prevents injury.

Muscular endurance is the ability of muscles to sustain repeated contractions or maintain a contraction over time. It is assessed through tests such as curl-ups, push-ups, and flexed-arm hang. Muscular endurance supports posture, reduces fatigue, and enhances performance.

Flexibility is the range of motion at a joint or series of joints. It is assessed through tests such as the sit-and-reach, shoulder stretch, and trunk lift. Adequate flexibility prevents injury, reduces muscle tension, and supports functional movement.

Body composition is the proportion of fat mass to fat-free mass (muscle, bone, organs, water). It is assessed through skinfold measurements, bioelectrical impedance, hydrostatic weighing, and DEXA scans. Healthy body composition reduces risk of chronic disease and supports physical function.

Skill-related fitness components enhance performance in sports and physical activities.

Agility is the ability to change direction quickly while maintaining control. Speed is the ability to perform a movement in a short time. Power is the ability to exert force rapidly (strength × speed). Balance is the ability to maintain equilibrium while stationary or moving. Coordination is the ability to use senses and body parts together for smooth movement. Reaction time is the time between stimulus and response.

While skill-related fitness is emphasized in athletics, these components also support daily activities and injury prevention.

Training principles guide safe and effective physical activity programming.

The overload principle states that fitness improves when demands exceed current capacity. Overload is achieved by manipulating frequency, intensity, time, and type (FITT principle).

The principle of progression indicates that overload should increase gradually to allow adaptation and prevent injury. Increasing training variables by no more than 10% per week is a common guideline.

The principle of specificity states that training adaptations are specific to the type of exercise performed. Cardiorespiratory training improves cardiorespiratory function; strength training improves strength.

The principle of reversibility indicates that fitness gains are lost when training stops (detraining). Maintaining regular activity preserves fitness.

The principle of individual differences recognizes that responses to training vary based on genetics, age, sex, training status, and other factors.

Periodization organizes training into cycles that vary volume and intensity to optimize performance and recovery.

The Physical Activity Guidelines for Americans recommend specific amounts and types of activity for health benefits.

Children and adolescents (6-17 years) should engage in 60 minutes or more of moderate-to-vigorous physical activity daily. This should include aerobic activity, muscle-strengthening activity (at least 3 days per week), and bone-strengthening activity (at least 3 days per week).

Adults (18-64 years) should engage in at least 150-300 minutes of moderate-intensity aerobic activity or 75-150 minutes of vigorous-intensity aerobic activity per week. Adults should also perform muscle-strengthening activities involving all major muscle groups at least 2 days per week.

Older adults (65+ years) should follow adult guidelines as abilities allow, adding balance training to prevent falls. Chronic conditions require activity plans tailored to abilities and health status.

Physical activity intensity can be measured objectively (heart rate, METs) or subjectively (talk test, rating of perceived exertion). Moderate intensity allows conversation but not singing. Vigorous intensity limits conversation to a few words.

Regular physical activity provides extensive health benefits across body systems.

Cardiovascular benefits include reduced resting heart rate and blood pressure, improved cholesterol profile, increased cardiac output, and decreased cardiovascular disease risk.

Metabolic benefits include improved insulin sensitivity, better blood glucose control, increased metabolic rate, and reduced Type 2 diabetes risk.

Musculoskeletal benefits include increased bone density, improved muscle strength and endurance, enhanced joint health, and reduced injury risk.

Body composition benefits include decreased body fat, increased lean mass, and improved weight management.

Mental health benefits include reduced symptoms of depression and anxiety, improved mood, enhanced cognitive function, and better sleep quality.

Cancer prevention benefits include reduced risk of colon, breast, endometrial, lung, and other cancers.

Longevity benefits include reduced all-cause mortality and improved quality of life in older adults.

Nutrition supports physical performance, recovery, and health.

Carbohydrates are the primary fuel for moderate-to-high intensity activity. Complex carbohydrates provide sustained energy. Pre-exercise carbohydrate intake optimizes glycogen stores. Post-exercise carbohydrates replenish glycogen.

Proteins support muscle repair and growth. Physically active individuals may need 1.2-2.0 grams per kilogram of body weight daily, depending on activity type and intensity. Protein intake distributed throughout the day optimizes muscle protein synthesis.

Fats provide energy for low-intensity and prolonged activity. Essential fatty acids support cell membrane integrity and hormone production. Trans fats and excessive saturated fats should be limited.

Hydration is critical for performance and safety. Dehydration impairs physical and cognitive function and increases heat illness risk. Fluid needs depend on activity duration, intensity, environment, and individual factors. Water is adequate for most activities under 60 minutes. Electrolyte replacement may be needed for prolonged or intense activity in hot environments.

Micronutrients including iron, calcium, vitamin D, and B vitamins support energy production, bone health, and oxygen transport. Whole foods provide micronutrients more effectively than supplements for most individuals.

Safe exercise requires attention to preparation, technique, and environment.

Warm-up prepares the body for activity by gradually increasing heart rate, blood flow, and muscle temperature. A proper warm-up includes light aerobic activity and dynamic stretching.

Cool-down promotes recovery by gradually decreasing heart rate and removing metabolic waste. Static stretching is appropriate during cool-down.

Proper technique prevents injury and maximizes benefits. Instruction, demonstration, and feedback support skill development.

Appropriate equipment includes properly fitted footwear, protective gear, and maintained facilities and apparatus.

Environmental considerations include heat, cold, altitude, and air quality. Heat illness prevention requires hydration, appropriate clothing, acclimatization, and recognition of warning signs. Cold injury prevention requires layering, moisture management, and limiting exposure.

Overtraining results from inadequate recovery and manifests as decreased performance, fatigue, mood disturbances, and increased injury and illness risk. Rest and recovery are essential training components.

Medical clearance may be necessary for individuals with health conditions, symptoms, or risk factors. Physical activity can be modified to accommodate various abilities and conditions.