Important

• Distinction Between Physical Activity and Exercise – It is crucial to distinguish that physical activity is any bodily movement resulting in energy expenditure (including household chores), whereas exercise is a subset of physical activity that is planned, structured, and repetitive with the goal of improving fitness.
• The 50% Dropout Rate – A key statistic to know is that approximately 50% of individuals who start a structured exercise program will drop out within the first six months, making this timeframe a critical testing ground for adherence.
• Self-Efficacy as a Predictor – Self-efficacy is highlighted as the most consistent predictor of exercise participation, relapse, and resumption, leading to a lower perception of effort during exercise.
• Intrinsic vs. Extrinsic Motivation – Understanding the difference is vital: intrinsic motivation drives participation for the inherent pleasure and challenge of the activity, whereas extrinsic motivation is driven by outside factors like rewards, social recognition, or avoidance of punishment.
• Appropriate Starting Points – It is emphasized that sedentary individuals should not begin with high-intensity activities, as discomfort leads to dropout; walking programs generally have lower dropout rates than running programs.
• Goal of Health Promotion – The primary goal is to prevent, reduce, and eliminate behaviors that pose risks to health while increasing healthy behavior patterns.

Core Concepts

• Motivation: The internal processes, such as needs, thoughts, and emotions, that give behavior energy (strength/intensity) and direction (purpose).
• Adherence: The ability to follow a specific regimen, such as an exercise program, on a regular basis over an extended period of time.
• Determinant Research: Research dedicated to evaluating the genetic, psychological, social, program, and environmental factors that affect exercise behavior.
• Intervention Research: Research that seeks to manipulate the different factors (determinants) that affect exercise behavior rather than altering the behavior directly.
• Motivational Interviewing: A client-centered collaborative conversation style for strengthening a person’s own motivation and commitment to change, often used to help individuals overcome ambivalence.
• Physical Activity as Treatment vs. Outcome: Research can view physical activity as the outcome variable (trying to increase activity levels) or as the treatment variable (using activity to modify a health outcome like depression).
• Sedentary Behavior vs. Physical Inactivity: Sedentary behavior is defined as waking behaviors with low energy expenditure (≤1.5 METs) while sitting/reclining, whereas physical inactivity is the failure to meet physical activity guidelines; one can be active yet still sedentary for long periods.
• Built Environment: The elements of a community designed or constructed by people (e.g., sidewalks, bike lanes, parks) that can inhibit or promote physical activity.
• Self-Regulation: A mechanism where behavior is self-directed, initiated, monitored, and evaluated by the individual to be consistent with accomplishing personal goals.
• Stage-Matching Interventions: Specific intervention strategies tailored to an individual’s current stage of change within the Transtheoretical Model to maximize effectiveness.

Theories and Frameworks

• Transtheoretical Model (TTM): A framework proposing that individuals move through five stages of change—precontemplation, contemplation, preparation, action, and maintenance—influenced by self-efficacy, decisional balance, and processes of change.
• Theory of Planned Behaviour (TPB): Suggests that the most proximal determinant of behavior is intention, which is influenced by attitude, subjective norms, and perceived behavioral control.
• Social Cognitive Theory (SCT): Views motivation as a dynamic interplay of personal, behavioral, and environmental influences (reciprocal determinism), with self-efficacy being a core component.
• Self-Determination Theory (SDT): A global theory asserting that individuals are motivated to satisfy three basic psychological needs—competence, autonomy, and relatedness—and that motivation exists on a continuum from amotivation to intrinsic regulation.
• Health Belief Model: A model suggesting that the likelihood of engaging in preventive health behaviors depends on the perception of personal threat (susceptibility and severity) and the appraisal of costs versus benefits.
• Achievement Goal Theory: A motivation theory proposing that how individuals evaluate competence and define success (task orientation vs. ego orientation) influences their behavior and emotional responses.
• Health Action Process Approach (HAPA): A model designed to bridge the “intention-behavior gap” by distinguishing between a motivational phase (forming intentions) and a volitional phase (planning and action control).
• Exercise Self-Schemata Theory: Suggests that individuals develop cognitive frameworks (schemata) about exercise based on experience; those with an exercise self-schema process information faster and are more likely to exercise.
• Physical Activity Maintenance (PAM) Model: A model predicting long-term maintenance of physical activity based on goal setting, self-motivation, self-efficacy, and the physical activity environment.

Notable Individuals

• Albert Bandura: Developed Social Cognitive Theory and the concept of self-efficacy, which is a major predictor of exercise behavior.
• Icek Ajzen: Developed the Theory of Planned Behaviour, highlighting intention as the primary driver of behavior.
• Edward Deci & Richard Ryan: Developed Self-Determination Theory, focusing on intrinsic motivation and basic psychological needs.
• James Prochaska & Carlo DiClemente: Developed the Transtheoretical Model (stages of change) to understand readiness for behavior change.
• Irwin Rosenstock: Associated with the development of the Health Belief Model regarding preventive health behaviors.
• John Nicholls: Proposed Achievement Goal Theory, distinguishing between task and ego orientations.
• Ralf Schwarzer: Proposed the Health Action Process Approach (HAPA) to explain the translation of intention into action.
• Hazel Rose Markus: Associated with the concept of self-schemata, which Kendzierski applied to exercise behavior.
• Claudio Nigg: Proposed the Physical Activity Maintenance (PAM) model to understand long-term adherence.