Researchers studied university students to determine the sociodemographic and behavioural variables associated with different physical activity levels.
Adults are encouraged to participate in at least 150 minutes of moderate physical activity or 75 minutes of vigorous exercise per week as recommended by the Centers for Disease Control and Prevention (CDC). Previous studies have shown that these levels of physical activity can help to prevent obesity as well as a number of chronic conditions such as type 2 diabetes and cardiovascular disease. They can also help to prevent certain cancers like colon and breast cancer improve general well-being quality of sleep, reduce depression, and increase cognitive capacity. However, several factors such as technology use, sleep, and sociodemographic characteristics could affect the recommended levels of physical activity.
Technology Use, Sleep, and Ethnicity May Affect Physical Activity
The increased use of technology might affect young adults’ health behaviour. It could reduce the cardiorespiratory fitness of the college students if they consistently use their mobile phones or other gadgets instead of engaging in active activities. Studies, however, have shown mixed results among male and female students. In previous research, sedentary technology use (i.e. desktop computers) was associated with less activity in males, but not in females.
Additionally, sleep may impact physical activity. For instance, sleep is vital in maintaining normal function, but college or university students often experience sleep deprivation. In this case, short-term sleep loss might be associated with decreased levels of physical activity.
Furthermore, sex and race or ethnicity may also influence physical activity levels. One study found higher levels of physical activity among males than females from years 2000 to 2011 in several US counties. However, during the same timeline, increasing levels of physical activity were found among females. A study in the US demonstrated that among both men and women, non-Hispanic white adults had higher regular physical activity levels compared to all other groups. Thus, all of these factors are important to examine and understand how they impact physical activity levels to combat the obesity epidemic and related comorbidities.
A study recently published in BMC Public Health aimed to identify physical activity levels among undergraduate and graduate college students who were enrolled in college and assess the relationship between sociodemographic (e.g. sex, race/ethnicity) and behavioural factors (e.g. sleep, technology use) that are associated with physical activity. Many young adults in college or university are beginning to establish their long-term health habits and the researchers emphasized that understanding the effects of various variables on their levels of physical activity is crucial to developing programs for long-term health.
Surveying University Students
The researchers conducted a cross-sectional analysis of survey responses during the start of the fall semester in 2014. An online survey was sent to all enrolled graduate and undergraduate students and a total of 490 students completed the survey. The response rate was 87.6% for undergraduate students and 48.4% for graduate students. The average age of students was 21 years.
The results indicated that on average, students used smartphones most often at about 4.4 hours per day, followed by laptops at around four hours a day. They used desktops at about one hour per day and tablets at a half-hour per day. The students reported sleeping around 6.7 hours per night. The respondents were predominately male (69%) and 32% identified as a racial or ethnic minority. The majority of the students (60%) were also within the normal range for body mass index, with only 12% who were classified as obese.
Majority of Students Met Recommended Physical Activity Guidelines
The results showed that the majority of respondents met or exceeded the recommended physical activity guidelines. In fact, 85% of the college students reported having at least 150 minutes of moderate to vigorous physical activity per week, and only 15% did not. The results showed that the individuals who reported more than 150 minutes of vigorous physical activity per week were more likely to be male, and non-Hispanic white. They were also the highest users of technology and received low-moderate levels of sleep (not the lowest level).
Smartphone Use May Drive Physical Activity Levels
Based on the results, the researchers found that both a minority status and being female were the strongest sociodemographic factors that are associated with insufficient physical activity levels. On the other hand, high technology use, primarily by using a smartphone, was associated with higher activity levels. In contrast to previous assumptions, smartphone use may actually drive the physical activity levels and not the other way around. These students may be using technology while on the move, like walking or biking or exercising in the gym, and could actually be using these devices to monitor their movements. The study participants indicated that they use their technology devices for recreation and also for work. In this case, the researchers failed to gather information about the types of activities that the students were using.
There are limitations in the study that were discussed by the researchers. They were not able to draw conclusions confirming cause and effect due to the observational nature of the study. Because the study was limited to college students, the findings may not be widely generalizable to other populations. In addition, the participants reported higher than average levels of activity, which may not represent other college students.
This important study provides information for policymakers and healthcare providers interested in increasing levels of physical activity in the population. Interventions aimed at females and ethnic minorities will be important. With its ever-increasing use, technology will continue to impact our lives and our health in sometimes surprising ways.
Written by Alexa Deano
Reference: Town Jr SD, Ory MG, Smith ML, et al. Accessing physical activity among young adults attending a university: the role of sex, race/ethnicity/ technology use, and sleep. BMC Public Health. 2017 September 18.