Walking
Overview
Walking has been the most basic means of movement since humans began upright walking, and it is a representative aerobic physical activity that anyone can perform without special equipment or cost. It is the action of alternately stepping with both feet at a speed of about 4–6 km/h while supporting body weight, and large cohort studies have repeatedly verified that walking regularly for at least 30 minutes a day can significantly lower the risk of cardiovascular disease, type 2 diabetes, obesity, depression, and other conditions. In recent years, it has been reevaluated not merely as a means of movement but as a key keyword in exercise prescription, mental health management, and urban policy.
Key Content
Physiological Basis
Walking consists of a repeating motion called the gait cycle. The stance phase (about 60%), in which one foot touches the ground, and the swing phase (about 40%), in which the foot leaves the ground and moves forward, alternate, with a brief double-support phase in which both feet touch the ground. During this process, the ankles, knees, and hips absorb shock, and rotation of the pelvis and spine stabilizes gait. In terms of energy metabolism, walking corresponds to moderate-intensity aerobic exercise at about 40–60% of maximal oxygen uptake, and because a high proportion of fat is used as fuel, it is advantageous for body fat management. During walking, ground reaction force amounting to 1.2–1.5 times body weight is applied to the lower limbs, so people with joint disease should adjust stride length and speed.
Health Benefits
- Cardiovascular system: Regular brisk walking is reported to lower blood pressure by an average of 3–5 mmHg, reduce LDL cholesterol, and lower the risk of coronary artery disease by about 20–30%.
- Metabolic function: Walking for 10–15 minutes after meals eases blood sugar spikes and improves insulin sensitivity. In particular, some studies show that walking after meals has a greater blood sugar control effect than walking before meals for the same amount of time.
- Mental health: Regular walking lowers cortisol levels and promotes serotonin secretion, alleviating symptoms of depression and anxiety. There is also research on 'green exercise' showing that walking in natural environments reduces rumination more than walking in urban areas.
- Musculoskeletal system: It maintains lower-body strength and balance, lowering the risk of falls, and slows bone density loss, contributing to the prevention of osteoporosis.
- Cognitive function: There are longitudinal studies showing that groups who walked three or more times a week after middle age experienced less hippocampal volume loss and had a lower incidence of dementia.
Exercise Prescription and Recommended Amounts
The World Health Organization (WHO) recommends 150–300 minutes of moderate-intensity aerobic activity per week, or 75–150 minutes of vigorous-intensity activity per week, for adults, and walking is the most accessible means of meeting this. 'Moderate intensity' refers to a breathing state in which one can talk with the person next to them but has difficulty singing. If it is difficult to complete 30 minutes a day at once, the general view is that splitting it into three 10-minute sessions produces similar effects. In terms of step count, a recent meta-analysis found that the mortality reduction effect peaks at 7,000–8,000 steps per day, and '10,000 steps' is closer to a symbolic goal than an absolute standard.
Posture and Technique
Proper walking begins with a posture in which the gaze is fixed 10–15 m ahead, the chin is slightly tucked, the shoulders are relaxed, and light tension is maintained in the abdomen. If the heel strikes first, the foot rolls, and then the big toe pushes off in that order, shock is dispersed. The arms are bent at about 90 degrees and swing naturally back and forth, and since excessively widening the stride increases strain on the knees and shins, it is desirable to maintain a speed of 100–130 steps per minute.
History and Culture
Walking was also a tool of thought for philosophers. The Aristotelian school was called the 'Peripatetic' school, and Nietzsche wrote, 'Good thoughts do not come to mind without walking.' Since modern times, it has expanded into cultural forms such as hiking and pilgrimage (the Camino de Santiago) and urban strolling (the flâneur), and in the 21st century, as step-counting functions on smartphones and wearable devices became widespread, 'walking' became gamified and datafied.
Recent Trends
In 2024–2025, walking is being reevaluated as a core means of low-intensity Zone 2 training. As it has been highlighted that walking raises mitochondrial function and fat oxidation capacity while carrying a lower risk of injury than high-intensity exercise, more people are choosing brisk walking instead of running. Centered on TikTok and YouTube, the so-called '12-3-30' routine—walking for 30 minutes at a 12% incline and 4.8 km/h on an incline treadmill—has spread, and personalized walking coaching services linked with smartwatch step count, heart rate, and heart rate variability (HRV) data are also growing. In addition, social communities in the form of 'walking groups' (e.g., walking clubs) have become popular among younger people, establishing a culture that combines exercise and relationship building, and local governments in various countries are institutionally encouraging walking in daily life through pedestrian-friendly city policies and '15-minute city' plans. In Korea as well, walking app-based challenges, step donation campaigns, and forest trail and walking trail improvement projects are steadily expanding. On the other hand, average daily step counts continue to decline due to increased sedentary lifestyles, increasing the need for public health interventions.
Related Topics
- [[유산소 운동|Aerobic exercise]]
- [[만보|10,000 steps]]
- [[러닝|Running]]
- [[심혈관 질환|Cardiovascular disease]]
- [[Zone 2 트레이닝|Zone 2 training]]
- [[보행 친화 도시|Walkable city]]