Walking serves as a simple yet effective way to incorporate physical activity into your daily routine, offering notable benefits for mental well-being. Many individuals, including myself, embraced regular walks during the pandemic, leading to significant improvements in our overall quality of life. However, the question arises: can walking truly be classified as cardio exercise?
The answer is nuanced. In certain aspects, walking qualifies as cardio: it aids in calorie burning, elevates heart rate, and contributes to the recommended weekly exercise quota for everyone. Nonetheless, it may not enhance your cardiovascular fitness as effectively as more intense activities like running or high-energy aerobics. To boost endurance, additional effort beyond walking is necessary.
Calorie Burn: Walking vs. Running
When comparing calorie expenditure, running generally burns more calories than walking in a given timeframe, although distance-wise, they can be quite similar.
A common guideline suggests that approximately 100 calories are burned per mile, regardless of whether you walk or run. However, actual calorie burn can vary based on body size (larger individuals burn more) and pace. While calories burned per mile tend to be slightly lower for walking, the disparity becomes more pronounced when considering calories burned per hour: a 150-pound individual burns around 324 calories per hour walking, contrasted with 627 calories while running. Thus, running can yield nearly double the calorie burn in the same period. Nevertheless, if walking is your preference and time allows, both activities can be beneficial.
Walking Cannot Substitute for Vigorous Cardio
Different exercise intensities provide distinct advantages. Walking is categorized as very easy cardio, jogging as moderate, and high-intensity activities include sprinting or racing. All forms of exercise contribute positively to health, though your specific objectives may dictate which ones are necessary.
For instance, aspiring to be a fast runner requires substantial moderate cardio (like slow running) along with some high-intensity training. Conversely, if your goal is simply to stay active without a focus on improvement, lower-intensity exercises like walking may suffice.
Health organizations recommend at least 150 minutes of "moderate" exercise or 75 minutes of "vigorous" exercise weekly. You can mix these types, with the understanding that each minute of vigorous exercise counts as double.
Where does walking fit into this guideline? It is classified as moderate exercise. To align with heart rate recommendations, the American Heart Association defines moderate exercise as maintaining a heart rate between 50-70% of your maximum, while vigorous exercise ranges from 70-85%. Walking typically falls within the moderate category, meaning you would need to engage in twice the amount of walking--counting minutes--compared to more vigorous cardio to achieve similar benefits.
Walking Can Be More Than a Leisurely Stroll
The difference between walking and running is mechanical: if at least one foot remains on the ground, you are walking; if your gait involves a bounce from foot to foot, you are running (jogging is simply a slower version of running).
While maintaining a higher intensity (and heart rate) is often easier through running, this isn't always the case. Hiking uphill, for instance, can elevate your heart rate into the "vigorous" zone. Additionally, a well-trained runner might maintain a slow jog while keeping their heart rate in the "moderate" range.
As you plan your workouts, consider the intensity: monitor your heart rate to determine where you stand. You can use a fitness tracker or manually check your pulse. If your maximum heart rate is 200 and you measure 150 beats per minute, you are exercising at 75% of your maximum.
Walking may elevate your heart rate more than you expect, especially if you are new to exercise or tackling hilly paths. For a more challenging cardio workout, increase your walking speed or opt for other activities like cycling or dancing that can raise your heart rate further. However, if a leisurely walk is your goal, that is perfectly acceptable.
