Physical activity monitoring is a research area focused on developing and implementing technologies to track and measure individuals' physical activity levels throughout the day. This includes monitoring activities such as walking, running, cycling, and other forms of exercise. Researchers in this area may use tools such as wearable fitness trackers, smartphone apps, and sensors to collect data on an individual's movement patterns, energy expenditure, and overall physical activity levels. This information can be used to assess an individual's health, fitness, and adherence to recommended physical activity guidelines. Additionally, physical activity monitoring research may also investigate the impact of various interventions and behavior change strategies on promoting and maintaining healthy levels of physical activity.