Introduction to Fitness, Health, and Determinants of Health

Introduction to Fitness and Health

Historical Views: "Exercise is Medicine"

This section outlines the historical perspectives on exercise and health, emphasizing the evolution of thought regarding physical activity and its impact on well-being.

• Susruta (India, ~600 BCE): Early advocate for prescriptive exercise as medicine, warning against both inactivity and excessive exercise.

• Hippocrates (Greece): Stressed the importance of both diet and exercise for health.

• Galen (Rome): Recommended exercise for everyone, highlighting the significance of movement and exercise for health.

• Aristotle: Advocated for the value of walking and exercise in maintaining health.

• Luigi Galvani: Early studies on muscle physiology and movement.

• Cardiologists & Modern Physiology: Development of heart rate measurement and exercise physiology.

• William Harvey: Discovery of blood circulation.

• Modern Epidemiology: Studies linking physical activity to disease risk reduction.

Lifestyle Factors in Health

Complex Relationships

Lifestyle and health are interconnected, with behaviors, environment, and genetics all playing roles in determining health outcomes.

• Behavioral Choices: Choices such as exercise, diet, and sleep impact health.

• Social Influences: People are more likely to be active when others are active.

• Self-Efficacy: Belief in one's ability to make healthy choices is crucial.

What is Physical Fitness?

Components of Physical Fitness

Physical fitness is defined by the ability to perform daily activities with optimal energy and minimal fatigue.

• Cardiorespiratory Endurance: Efficiency of heart and lungs during exercise.

• Muscular Strength and Endurance: Ability to exert force and sustain activity.

• Flexibility: Range of motion in joints.

• Body Composition: Proportion of fat and lean mass.

Physical fitness enables individuals to:

1. Live optimally

2. Perform daily activities efficiently

3. Adapt to stress and challenges

What is Health?

Definitions and Models

Health is a multidimensional concept, not merely the absence of disease, but a state of complete physical, mental, and social well-being.

• WHO Definition: "Health is a state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity."

• Physician Model: Focuses on disease and symptoms.

• Holistic Model: Emphasizes overall well-being and prevention.

Current Leading Causes of Death

Major Causes in North America

Understanding the leading causes of death helps prioritize health interventions and prevention strategies.

• 2018 (North America): Cancer, heart disease, accidents.

• 2020 (U.S.): COVID-19 added as a major cause.

• Canada: Cancer and heart disease together account for over 51% of deaths.

Risk changes with age:

• Young: Accidents (car crashes, falls, etc.)

• Older: Chronic diseases (cancer, heart disease)

Minimizing Risk of Death

Strategies and Examples

Reducing risk involves lifestyle changes, safety measures, and health promotion.

• Exercise: Regular physical activity reduces risk of chronic disease.

• Safety: Avoiding risky behaviors (e.g., driving at night, falls).

Life Expectancy and Healthspan

Trends and Influences

Life expectancy is increasing, but the goal is to maximize years spent in good health (healthspan).

• Canada: Life expectancy at birth is 82 years (2019).

• Healthspan: Years spent in reasonable health, not severely disabled.

Factors influencing life expectancy:

• Medical advances

• Public health improvements

• Socioeconomic status

Determinants of Health

Key Factors

Health is determined by a combination of biological, behavioral, social, and environmental factors.

• Behavioral: Smoking, diet, physical activity, sleep.

• Social: Family, support networks, education.

• Environmental: Housing, pollution, neighborhood safety.

• Genetic: Family history of disease.

Canadian Health Care System

Structure and Funding

Canada's health care system is publicly funded, providing universal access to medically necessary services.

• Public Funding: Taxes fund health care services.

• Private Insurance: Available for services not covered by public system.

• OHIP (Ontario Health Insurance Plan): Covers residents for medically necessary hospital and physician services.

Health Care Costs

Spending and Efficiency

Health care spending is a significant portion of GDP in Canada and other developed countries.

• Canada: About 10-11% of GDP spent on health care.

• U.S.: About 16-17% of GDP spent on health care.

Efforts are ongoing to improve efficiency and outcomes while controlling costs.

WHO Main Determinants of Health

Classification

The World Health Organization identifies several main determinants of health:

• Inner Real Side: Age, sex, and constitutional (biological) factors.

• Individual Lifestyle Factors: Personal behaviors and choices.

• Social and Community Networks: Family, friends, and community support.

• Living and Working Conditions: Employment, housing, education, and environment.

• General Socioeconomic, Cultural, and Environmental Conditions: Broader societal influences.

Environment and Health

Influences and Risks

Environmental factors such as air pollution, water quality, and neighborhood safety significantly affect health outcomes.

• Physical Environment: Housing, pollution, access to green spaces.

• Social Environment: Support networks, relationships.

Built Environment and Physical Activity

Impact on Health

The design of neighborhoods and cities can promote or hinder physical activity and health.

• Walkability: Areas with sidewalks and parks encourage activity.

• Access to Facilities: Availability of gyms, pools, and recreation centers.

Health Pathways Diagram

Steps from Environment to Health Outcomes

This diagram illustrates how environmental and behavioral factors lead to biological responses, chronic disease, and ultimately health care utilization and costs.

Step	Description
Environment / Travel	Transportation infrastructure, land use, walkability, pollution
Behaviors & Exposure	Physical activity, safety, risk behaviors
Biological Response	Obesity, diabetes, cardiovascular risk
Chronic Disease	Physical impairments, diabetes, injuries
Results	Higher health care utilization and cost

Self-Understanding and Health

Personal and Social Influences

Self-understanding, including awareness of genetic predispositions and social circumstances, helps individuals make informed health choices.

• Genetics: Family history of disease.

• Social Circumstances: Education, employment, relationships.

Levels of Health Care in Canada

Primary, Secondary, and Tertiary Care

Health care is organized into levels based on complexity and specialization.

• Primary Care: Family doctors, general practitioners, pharmacists.

• Secondary Care: Specialists, hospital-based services.

• Tertiary Care: Highly specialized care at major hospitals.

Public vs. Private Health Care

Comparison Table

System	Pros	Cons
Full Private	Faster care, more choice, more privacy	Inequality, not everyone can afford, may exclude complex cases
Full Public	Everyone gets same basic health care, more affordable	Longer wait times, fewer choices, higher taxes for workers
Mixed	Private can take pressure off public, some choice for those who can pay	Risk of inequality, may undermine public system

Prevention vs. Treatment

Health Budget Allocation

Most health budgets focus on treatment, but prevention and health promotion are essential for reducing chronic disease and costs.

• Treatment: Physicians, hospitals, drugs.

• Prevention: Public health campaigns, education, lifestyle interventions.