High Cholesterol (Dyslipidaemia): Understanding, Managing, andImproving Cardiovascular Health

High cholesterol, also known as dyslipidaemia, is a common health condition involving
abnormal levels of fats (lipids) in the blood. It can increase the risk of cardiovascular
disease and other health complications over time. While cholesterol is an important
substance required by the body, having excessive levels of certain types of cholesterol
can contribute to the development of fatty deposits within the arteries.
Dyslipidaemia can often be managed through a combination of regular physical activity,
exercise, healthy dietary patterns, lifestyle strategies, and medical management where
appropriate. Accredited Exercise Physiologists can play an important role in helping
individuals safely increase physical activity, improve cardiovascular fitness, manage
cardiovascular risk factors, and develop sustainable exercise habits.
Cholesterol itself is not necessarily harmful. The body requires cholesterol to produce
hormones, vitamin D, and other substances needed for normal function. However, the
balance and levels of different blood lipids are important for cardiovascular health.

Abnormal blood lipid levels can affect:

• Cardiovascular health
• Blood vessel health
• Exercise capacity and physical fitness
• Long-term risk of cardiovascular disease
• Ability to participate in physical activity
• Overall health and quality of life

Understanding Dyslipidaemia
Dyslipidaemia refers to abnormal levels of lipids in the blood. A standard blood lipid
profile may measure several different components.
These can include:

• Low-density lipoprotein (LDL) cholesterol
• High-density lipoprotein (HDL) cholesterol
• Triglycerides
• Total cholesterol
  LDL cholesterol is commonly referred to as “bad” cholesterol because elevated levels
  can contribute to the development of fatty deposits within the arteries.
  HDL cholesterol is commonly referred to as “good” cholesterol because it plays a role in
  transporting cholesterol away from tissues and towards the liver for processing.
  Triglycerides are another type of fat found in the blood. Elevated triglyceride levels can
  also be associated with increased cardiovascular risk.
  The interpretation of cholesterol levels should consider the individual’s overall
  cardiovascular risk rather than focusing on a single blood test result in isolation.

What Causes High Cholesterol?
Dyslipidaemia can develop due to a combination of genetic, biological, lifestyle, and
medical factors.
Potential contributing factors include:

• Genetics and family history
• Increasing age
• Physical inactivity
• Dietary patterns
• Overweight and obesity
• Smoking
• Excessive alcohol consumption
• Diabetes
• Certain medical conditions
• Some medications
  Some individuals may have genetically elevated cholesterol levels, meaning that
  lifestyle changes alone may not be sufficient to manage their cholesterol. Medical
  management may therefore be required alongside lifestyle strategies.

Common Symptoms
High cholesterol usually does not cause noticeable symptoms.
An individual can have elevated cholesterol for many years without feeling unwell. This
is one reason regular health checks and blood tests are important, particularly for
individuals with other cardiovascular risk factors.
Although high cholesterol itself may not produce symptoms, the cardiovascular disease
associated with prolonged elevated cholesterol can eventually affect physical function
and exercise capacity.

Potential consequences of cardiovascular disease can include:

• Reduced exercise tolerance
• Shortness of breath during activity
• Fatigue
• Chest discomfort
• Reduced physical capacity
• Reduced participation in physical activity
• Reduced quality of life
  Risk Factors
  Risk factors for dyslipidaemia can be divided into factors that cannot be changed and
  those that may be modified.
  Non-modifiable factors:
• Age
• Genetics
• Family history
• Biological factors
  Potentially modifiable factors:
• Physical inactivity
• Sedentary behaviour
• Dietary patterns
• Overweight and obesity
• Smoking
• Excessive alcohol consumption
• Poor cardiovascular fitness
  Other health conditions, including diabetes and high blood pressure, can also
  contribute to an individual’s overall cardiovascular risk.

How Exercise Helps
Regular physical activity and structured exercise are important components of
cardiovascular health and can contribute to improvements in blood lipid profiles.
Exercise can:

• Improve cardiovascular fitness
• Improve aerobic capacity and endurance
• Support healthy body composition
• Help manage body weight
• Improve insulin sensitivity and blood glucose regulation
• Support cardiovascular health
• Increase daily physical activity
• Reduce sedentary behaviour
• Improve physical capacity
• Support overall quality of life
  Exercise can also provide important cardiovascular benefits beyond changes in
  cholesterol levels. Improving fitness and physical capacity can help individuals
  participate more easily in everyday activities and maintain long-term independence.
  From an Exercise Physiology perspective, the goal is not simply to prescribe exercise to
  “lower cholesterol”. The focus is on developing a safe, individualised, and sustainable
  exercise program that improves cardiovascular health and addresses the individual’s
  broader risk factors and goals.

Key Exercise Findings
Research supports regular aerobic and resistance exercise as important components of
cardiovascular disease prevention and management.
Aerobic Exercise
Aerobic exercise is particularly important for improving cardiovascular fitness and
supporting cardiovascular health.
Examples include:

• Walking
• Cycling
• Swimming
• Water-based exercise
• Jogging
• Group exercise classes
• Other activities that increase heart rate and breathing
  Regular aerobic exercise can:
• Improve cardiovascular fitness
• Improve exercise tolerance
• Support healthy blood lipid levels
• Improve blood pressure
• Improve insulin sensitivity
• Support healthy body composition
• Reduce cardiovascular risk
  Exercise intensity and duration should be adjusted according to the individual’s current
  fitness, health status, exercise experience, and goals.

Resistance Training
Resistance training is another important component of a comprehensive exercise
program.
Resistance exercise can:

• Improve muscular strength
• Improve functional capacity
• Support healthy body composition
• Improve insulin sensitivity
• Help individuals perform everyday activities more easily
• Reduce physical deconditioning
• Complement aerobic exercise as part of a cardiovascular health program

Exercises such as squats, sit-to-stands, step-ups, resistance-band exercises, and gym-
based resistance training can be modified according to individual ability.

Exercise and Cardiovascular Risk
High cholesterol is one of several factors that contribute to cardiovascular risk. Exercise
can therefore be particularly valuable when combined with strategies addressing other
risk factors.
Exercise can help support the management of:

• High blood pressure
• Poor cardiovascular fitness
• Physical inactivity
• Overweight and obesity
• Reduced insulin sensitivity
• Type 2 diabetes
• Reduced muscular strength
  Improving several cardiovascular risk factors simultaneously can contribute to better
  overall health outcomes.

Exercise Considerations
Most individuals can benefit from increasing physical activity, but exercise programs
should be appropriately tailored to the individual’s health status and cardiovascular
risk.
Exercise should be adjusted according to:

• Current cardiovascular health
• Blood pressure
• Current fitness level
• Exercise history
• Existing medical conditions
• Medications
• Musculoskeletal conditions
• Current strength and physical capacity
• Symptoms during exercise
• Individual goals and preferences
  Individuals with known cardiovascular disease or significant cardiovascular risk factors
  may require medical assessment or clearance before commencing or significantly
  increasing exercise, depending on their circumstances.
  An Accredited Exercise Physiologist can help identify appropriate starting levels,
  monitor exercise responses, and progressively develop an exercise program as physical
  capacity improves.

The Importance of a Holistic Approach
Managing dyslipidaemia involves more than focusing on cholesterol levels alone. A
holistic approach considers an individual’s overall cardiovascular risk, physical activity,
exercise capacity, lifestyle, health conditions, and goals.
A comprehensive approach may incorporate:

• Aerobic exercise
• Resistance training
• Increased daily physical activity
• Reduction of sedentary behaviour
• Weight management strategies where appropriate
• Healthy lifestyle behaviours
• Cardiovascular risk-factor management
• Education and self-management
• Pacing and recovery strategies
• Medical management where required
  Working alongside other health professionals, including general practitioners,
  cardiologists, dietitians, and other allied health professionals, may also be appropriate
  depending on the individual’s needs.
  From an Exercise Physiology perspective, regular and individualised exercise can help
  individuals improve cardiovascular fitness, increase physical capacity, support healthy
  lifestyle behaviours, and manage cardiovascular risk factors associated with
  dyslipidaemia.
  High cholesterol often has no obvious symptoms, but taking action early can be an
  important part of protecting long-term cardiovascular health. Exercise does not need to
  be extreme to be beneficial. Starting with achievable activities and progressively
  building physical capacity can help individuals develop sustainable habits that support
  their health and quality of life.
  With appropriate guidance, regular exercise can be an important part of a
  comprehensive approach to managing dyslipidaemia and maintaining long-term
  cardiovascular health.