Exercise, an eight-letter word that represents a seemingly endless number of activities. Taking a walk, dancing, training with weights or resistance bands, Pilates classes, and doing tai chi are just a few of the ways people get their physical activity “in” throughout the week. Exercises tend to fit into one or more of the four major types: aerobic/endurance, resistance/strength, flexibility/stretching, and balance (1;2).
Aerobic exercises, like a brisk walk or dancing, get our heart rate up and make us breathe harder in a bid to strengthen our heart, lungs, and circulation. Resistance exercises, like lifting weights or using resistance bands, help build our muscle strength. Flexibility exercises, like Pilates, get us to stretch our muscles and enhance joint movement. Lastly, balance exercises, like tai chi, try to make us steadier so we stay on our feet (1;2).
Cholesterol is a fat-like substance with a soft, waxy texture. The two main types are low-density lipoprotein (LDL) cholesterol (aka “bad” cholesterol) and high-density lipoprotein (HDL) cholesterol (aka “good” cholesterol). High levels of “bad” cholesterol can increase the risk of having a heart attack by contributing to the buildup of plaque in our arteries. To counteract this, “good” cholesterol helps collect excess “bad” cholesterol and carries it to the liver to be broken down and eventually eliminated from the body.
Given its important role, are there things we can do to increase our levels of “good” cholesterol? Well, exercise has been a critical part of plans to prevent and treat heart disease. With the help of a recent systematic review, let’s see whether it can be an effective strategy to boost “good” cholesterol in middle-aged and older adults (2).
What the research tells us
Let’s get moving! The review, which looks at aerobic, resistance, and stretching exercises alone or in combination, found that exercise likely increases HDL “good” cholesterol in middle-aged and older adults, compared with no exercise. While this is a great start, it’s also important to identify which types of exercise are, in fact, effective. Once we zoom in on the findings, we see that aerobic exercise is likely effective for improving HDL “good” cholesterol, while resistance and stretching exercise likely aren’t. It should be said that despite resistance and stretching exercises not appearing effective for this one outcome, they contribute to our health in other ways and should still be included in our overall exercise routine. The studies included in the review are good enough that we can be moderately sure about these findings (2).
Though the review doesn’t specify what duration, frequency, and intensity of aerobic exercise is best for increasing HDL cholesterol, the Canadian 24-Hour Movement Guidelines provide a general recommendation for improving our overall health and well-being. These guidelines state that adults aged 18 and older should engage in at least 150 minutes of moderate to vigorous aerobic physical activity every week (3). Do you incorporate aerobic exercise into your weekly exercise routine? If yes, keep it up! If you don’t yet, speak with your healthcare team about whether this type of exercise is appropriate for you and how you can safely use it to better your health.
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