IB Sports, exercise and health science A.3.2.4 Principles and Purposes of Exercise Prescription Notes

Exercise prescription

1. Exercise prescription must account for individual needs, abilities, and goals.
2. Exercise prescription involves creating an individualised plan that takes into account the intensity, duration, frequency, and type of exercise suitable for the person.

Exercise prescription is built around frequency, intensity, time, type, and progression

1. Frequency: aim for moderate aerobic activity on most days of the week and vigorous activity on three or more days.
2. Intensity: target 60 to 80% of maximum heart rate, or a perceived exertion of 12 to 16 on the Borg scale.
3. Time: complete 30 to 60 minutes per session; bouts of 10 minutes or more can be accumulated across the day.
4. Type: combine aerobic, resistance, flexibility, and neuromotor activities across the week.
5. Increase any training variable by no more than 5 to 10% per week to avoid injury and overtraining.
6. Frequency: How often an individual performs physical activity (e.g., daily, three times a week).
7. Intensity: The effort required during exercise, usually measured by heart rate, perceived exertion, or power output.
8. Time: The duration of each exercise session (e.g., 30 minutes).
9. Type: The kind of exercise chosen, such as aerobic (e.g., running), resistance (e.g., weightlifting), or flexibility training (e.g., yoga).
10. Progression: Gradually increasing the intensity or volume of exercise over time to enhance fitness without risking injury or burnout.

Planning improves safety and goal attainment

1. Exercise prescription ensures the effectiveness and safety of a training program.
2. Without proper planning, individuals are at risk for injury, overtraining, or not achieving their desired outcomes.

Safety

1. Exercise intensity aligns with the individual's fitness level.
2. Overexertion can lead to injuries like strains, sprains, or stress fractures.

Effectiveness

1. Tailoring an exercise plan to the individual's needs enhances the probability of achieving goals (e.g., fat loss, strength building, or cardiovascular improvements).
2. For athletes, a more specific, sport-focused plan will be necessary to improve skills and performance.

Progressive overload and monitoring guide effective exercise prescription

Progressive Overload Principle

1. The progressive overload principle dictates that for fitness to improve, the body must be exposed to greater-than-usual stress.
2. Progressing intensity (either by increasing weight, time, or reps) helps the body adapt without causing overtraining or injury.

Monitoring progress

1. Frequent assessments (e.g., fitness tests, subjective feedback) can help guide the progressive increase in exercise intensity.
2. Monitoring ensures that the individual progresses safely without excessive strain.

Exercise supports anxiety reduction, mood, and cognitive function

Reduction in Anxiety

1. Regular physical activity helps alleviate anxiety symptoms by lowering stress hormones such as cortisol. It also boosts endorphins, which act as natural mood enhancers.
2. Aerobic exercises like running, swimming, or cycling are particularly effective for this.

Improved Mood

1. Mood is a longer-lasting affective state, less intense than emotion, and often lacks a specific trigger.
2. Emotion is a short-lived, intense affective response to a specific stimulus.
3. Exercise shows stronger documented effects on mood than on transient emotional states.
4. Physical activity, particularly aerobic and resistance exercise, has been shown to improve mood by increasing the release of dopamine and serotonin, chemicals in the brain that regulate emotions.
5. Exercise can lead to increased positive emotions and decreased negative ones.
6. The thermogenic hypothesis proposes that a rise in body temperature during exercise relaxes muscle tension and reduces anxiety.
7. The endorphin hypothesis proposes that exercise stimulates endogenous opioid release, producing analgesia and euphoria.
8. The serotonin hypothesis proposes that exercise raises tryptophan availability and serotonin synthesis, improving mood.
9. The noradrenaline hypothesis proposes that exercise increases noradrenaline transmission, counteracting the depletion seen in depression.
10. The distraction hypothesis proposes that exercise provides a time-out from daily stressors.

Cognitive Function

1. Regular physical activity helps enhance cognitive function, especially in older adults.
2. It supports memory, learning, and problem-solving skills, and reduces the risk of cognitive decline, such as Alzheimer’s or dementia.

Exercise can support but not replace mental health treatment

Exercise is an adjunctive treatment for mental health conditions

1. Exercise is not a substitute for professional treatment (e.g., therapy or medication). It can serve as an adjunctive treatment for conditions like depression, anxiety, and stress.
2. Research shows that physical activity can significantly reduce symptoms and improve overall mental health.

Reduction in Symptoms of Depression

1. Non-clinical depression describes periods of low mood lasting days to weeks that do not impair daily function.
2. Clinical depression, or major depressive disorder, is diagnosed by DSM criteria with persistent symptoms lasting at least two weeks that impair function.
3. Exercise serves as an effective adjunct treatment for clinical depression alongside therapy and medication.
4. Exercise has been shown to significantly reduce depressive symptoms, particularly when combined with traditional treatments.
5. Regular aerobic or strength training exercises can reduce feelings of sadness, hopelessness, and lack of motivation.

Recommended Physical Activity Levels

1. The World Health Organization (WHO) recommends that adults engage in at least 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity exercise per week to enhance mental health.

Exercise can improve self-esteem, stress management, and social well-being

1. Exercise not only benefits physical health, but it also has profound effects on psychological well-being.
2. It can enhance self-esteem, improve stress management, and foster social connections.

Self-Esteem and Body Image

1. Regular physical activity improves body image by reducing body fat, increasing muscle tone, and enhancing overall physical fitness.
2. As physical changes become noticeable, individuals often report higher levels of self-esteem.
3. Maintaining a positive body image can have significant long-term benefits, including improved mental health, reduced stress, and better self-worth.

Stress Management

1. Exercise is known to regulate stress hormones, especially cortisol.
2. Cortisol is often elevated during stressful events, but regular exercise helps the body regulate cortisol production and can reduce its harmful effects over time.
3. Exercise not only helps manage acute stress but also reduces chronic stress by balancing hormone levels and improving mental resilience.

Exercise and Emotional Resilience

Exercise strengthens resilience to stress and emotional challenges

1. Regular physical activity contributes significantly to emotional resilience, the ability to recover from stress and adversity.
2. Exercise can reduce the impact of emotional stress by improving mood and fostering a sense of accomplishment and control.
   1. Physical activity can promote the growth of new brain cells in areas related to stress regulation and emotional processing, such as the hippocampus.
   2. Mood stability: Chronic exercise helps regulate mood swings by improving the balance of neurotransmitters such as serotonin and dopamine, which influence happiness and emotional well-being.
   3. Regular physical activity encourages the development of coping mechanisms that can be applied to other aspects of life, promoting emotional stability in stressful situations.

Role of Exercise Adherence in Long-term Mental Health Improvement

1. Adhering to an exercise regimen provides sustained mental health benefits, such as reduced anxiety, depression, and the prevention of future psychological disorders.
2. Consistency in exercise helps individuals manage emotional and psychological challenges over time.
   1. Routine as a coping strategy: The predictability and structure of regular exercise provide a healthy way to deal with life’s uncertainties, acting as a foundation for emotional well-being.
   2. Increased resilience: Long-term exercise adherence not only reduces symptoms of mental illness but also improves the ability to adapt to future stressors, enhancing emotional endurance.