User Personas: Discovering Factors That Influence Genz’s Sedentary Lifestyle for the Development of a Mobile Exergame Design Model

: The use of mobile devices for youths in tertiary education is found to be linked to sedentary behaviour. This paper attempts to create user personas on these youths and finding the factors that affect their sedentary lifestyles, which could assist the development of a mobile exergame design model. An online survey consisting of sociodemographic and IPAQ questionnaires was used to collect data on students in a public university. Three user personas were derived, which are based on their weekly physical activity levels: Low, Moderate, and High. It was found that income status, time management, daily smartphone usage, and fitness self-rating has a direct relationship with physical activity levels. The user personas share a common factor in that smartphone usage is essential to manage the youths‟ daily activities regardless of their physical activities. The derived user personas would assist future mobile exergame design model development by concentrating on the influencing factors from the Low and Moderate physical activity level groups.


Introduction
The sedentary lifestyle affects more than sixty percent of the Malaysian adult population (Lian, Bonn, Han, et al., 2016) with obesity being a major risk factor for many cardiovascular diseases such as coronary heart rate disease, heart failure, and stroke (Swift, Johannsen, Lavie, et al., 2014). The use of smartphones by youths in tertiary education is directly linked to sedentary behaviour; they are less active and less intensive with their exercises when engaged with their smartphones (Barkley, Lepp, & Salehi-esfahani, 2016).
This paper aims to recognise the sedentary lifestyle of Malaysian youths currently in tertiary education, in terms of their smartphone usage and physical activity. This, in turn, could assist in developing a mobile exergame design model suited for them. The research is done via an online survey, and the collected data aims to answer the following research questions (RQ):  RQ1: What kind of user personas can we identify based on these youths" weekly physical activity; categorised in High, Moderate, and Low physical activity users?  RQ2: What are the factors that influence and motivate each user persona that affects these youths" sedentary lifestyle?  RQ3: How could the user personas be used to assist the development process of a mobile exergame design model for youths in tertiary education?

Generation Z
Youths currently enrolled in their tertiary studies, e.g., university undergraduates, were born from the mid-1990s; the top part of the generation gap commercially known as Generation Z (GenZ) (Piette, List, Rana, et al., 2015). GenZs are exposed to the internet since young and adept with technology devices such as smartphones and tablets (Ozkan & Solmaz, 2015) and (Hussain et al., 2019). Daily tasks are managed at their fingertips on the go, and social media applications (apps) such as Instagram and TikTok play prominent roles in their daily interactions. Smartphone usage is common with GenZs, and its utilisation (be it for work or entertainment) is generally conducted when sedentary. When it comes to physical activity (PA), certain factors affect GenZs" motivation to exercise. According to (Biber, 2013), GenZs are motivated to be involved in PA when there are high attraction factors: being active and healthy, being able to progressively master skills, getting accomplishment recognised, and interacting and supporting one another socially. In contrast, GenZs are aversed to doing PA when there are possibilities of being incompetent, fear of injury, and lack of social support (T. Padmapriya et al, 2020).

Sedentary Behaviour and Physical Activity
Sedentary behaviour (SB) is defined as any waking behaviour, characterised by an energy expenditure of less than or equal to 1.5 metabolic equivalent task (MET) while in a sitting or reclining posture (Network, 2013). MET is used to represent the intensity of a PA by measuring the amount of oxygen consumed, and calories burn at rest (Júdice, Hamilton, Sardinha, et al., 2016). The MET values of activities such as Light PA (walking) is between 1.5 to 3.0 METs, Moderate PA (walking at a brisk pace) is between 3.0 to 6.0 METs and Vigorous PA (jogging or running) is above 6.0 METs (Haskell, Lee, Pate, et al., 2007). To promote and maintain health, healthy adults need to perform moderate PA (MPA) for a minimum of 150 minutes a week or perform vigorous PA (VPA) for a minimum of 60 minutes a week (Garber, Blissmer, Deschenes, et al., 2011).

Exergame Design Model
In the digital environment, exergame (a portmanteau of exercise and game) is an interactive digital game that utilises physical exertion as the determinant in reaching the game"s goal (Mueller, Khot, Gerling, et al., 2016). Exergame can be used to meet the recommended weekly PA, and it is also available on mobile devices such as smartphones, thus mobilising the exergame experience (Nigg, Mateo, & An, 2017). Pokemon Go is a type of mobile exergame as it indirectly encourages PA to reach game"s goals (

Understanding Users
Previous researches on exergame DM hardly addressed understanding the users, thus lacking any existing user maps to global ideals ( User-centred design (UCD) is an iterative design process that has four distinct phases in its operation:-Discovering Requirements, Designing Alternatives, Prototyping, and Evaluating; before a final product is released. UCD emphasised users" involvement from the beginning throughout the entire process until the end to ensure the final product is built around their requirements and needs (Sharp, Rogers, & Preece, 2019). The first phase of the UCD -"Discovering Requirements" is achieved by conducting user research. A user persona could then be created from the user research.
User persona (UP) is a character representation that could assist the product development with users in mind (Pruitt & Adlin, 2006). Typically a few UPs are derived to describe each persona"s background, motivations, and expectations. To answer our research questions, a UCD-centric approach was conducted in this study.

Methods
In this study, the user data was collected through an online survey via Google Forms. All consented respondents were between 18 to 25 years old, and each had a smartphone with internet connectivity to access the survey. All participants were undergraduates of the Universiti Putra Malaysia (UPM), with the majority being students of the Faculty of Computer Science and IT. The survey was accessible for four days from the 7th to the 10th of November 2019. A total of 35 respondents participated in the survey. The survey was a combination of two different collections of questionnaires that queried for data on sociodemographic profile (age, gender, race, income, smartphone usage) and health status (PA level and average sitting time among respondents). The latter was retrieved and extracted from a pre-validated, self-administered questionnaire: the International Physical Activity Questionnaire (Craig, Marshall, Sjöström, et al., 2003).

International Physical Activity Questionnaire (IPAQ)
The purpose of the IPAQ is to obtain data on PA and has been validated for use in both developed and developing countries. There are two versions of the questionnaire; the short and long versions. For this study, the short version was selected due to its practicality and reliability (Craig, Marshall, Sjöström, et al., 2003). The IPAQ is used to calculate the amount of PAs done during a specified time frame and the amount categorised to pre-determined PA levels. The different PA levels can be used to create distinct UPs when combined with the sociodemographic profile data.
To determine each participant"s PA level, the scoring protocol for IPAQ as per its guideline was used for analysis (Craig, Marshall, Sjöström, et al., 2003). A continuous PA score in the last 7 days for each participant is expressed in MET-minutes per week (MET-minutes/week), taking into account the frequency, intensity, and duration of the activities performed. These continuous scores were then categorised according to WHO classification for PA levels: High, Moderate, or Low (National Health and Morbidity Survey, 2015), as stated in Table 1.

Results
Thirty-five respondents participated in the survey. The mean age of the respondents was 20.11 years old, with almost half of them being female (49%). The mean monthly household income was RM4,542,86. The majority were from the Malay ethnic race (74%). Most did exercise during their leisure time (71%). A majority of them had played mobile games on their smartphones (83%). Their mean daily smartphone usage was 5.77 hours, and the majority used the Android operating system (74%). The primary use of the smartphone was for communication and social media (66%). Refer to Table 2 for full data. With the IPAQ results, the respondents were further split into three sub-categories based on their PA levels: High, Moderate, and Low. The total respondents were almost evenly split into the PA level groups, leaning heavily in the Low PA level group (LG) (37%). More males were found in the High PA LG (20%) and Moderate PA LG (20%), whereas most females are in the Low PA LG (26%). The Malay ethnic race is mostly from the Low PA LG (29%). iOS users were found predominantly in the High PA LG (11%). High PA LG had the highest mobile gaming players (90%) and also engaged more PA in the High PA LG during leisure times (90%). The monthly household income was the highest (RM5,900.00) from the High PA LG and lowest (RM3,692.31) from the Low PA LG. Daily smartphone usage was the highest in the High PA LG (6.80 hours) and lowest in Low PA LG (4.77 hours). Daily mobile gaming was the highest in the High PA LG (1.50 hours), followed by Low PA LG (1.45 hours) then Moderate PA LG (1.06 hours). Low PA LG spent more daily sedentary times (6.75 hours), followed by High PA LG (6.45 hours) then Moderate PA LG (5.13 hours). Respondents in the High PA LG rated themselves highest at 3.60 (on a scale of up to 5) in terms of their fitness rating, followed by those from Moderate PA LG (3.17) then Low PA LG (3.15). Engaging in PA during leisure times, monthly household income status, daily smartphone use, and fitness self-rating had a direct relationship with PA level groups; i.e., the higher the PA level, the higher the occurrence/situation was found. Refer to Table 3.

Discussion
Respondents from the High PA LG were found to be heavy mobile phone users. Their average monthly household income was also the highest compared to the other groups. The High PA LG also showed a great extent to engage PA in leisure time and rated themselves highly on their fitness. For all these situations, the relationship progressively increases from Low, Moderate to High PA LGs, and these data are represented in the following graph (Refer Figure 1). (hours) and Fitness Self-rating Based on the data results from Table 3, three distinct UPs were created using the IPAQ"s PA levels as the basis of difference. The UPs were derived from the data extracted in the user study, and the following three characters were created: Alia (representing Low PA level), Baharin (representing Moderate PA level) and Kelvin (representing High PA level). Refer Table 4. For each UP, the factors that influence their sedentary lifestyles are the type of PA and smartphone functions (tracking) for Kelvin; financial constraints, and time management for both Baharin and Alia. The common factor between these user personas is that the use of smartphones is crucial as a management tool for their daily use even during leisure times, thus having a high probability of being mostly sedentary given the activity performed during those times.

Conclusion
Three user personas were derived from this user study, representing the Malaysian GenZ undergraduates in terms of smartphone usage and their daily physical activities. The user personas are known as Alia, Baharin, and Kelvin, representing the respondents" PA LGs: Low, Moderate, and High, respectively. The factors that influence these youths" daily PA are smartphone functions, financial constraints, time management, and communications. The High PA level group respondents are found to be able to manage their fitness activities during leisure times, even when being highly sedentary themselves. Thus, to assist the development process of a mobile exergame design model for these youths, efforts would concentrate on the Low and Moderate PA level groups' influencing factors: time management, financial constraints, and communications.
Future work could include more respondents from the university as this user study representation is only on a sample obtained from undergraduates from one faculty. Additional questions can be added to query on the types of motivation suitable for use in encouraging PA for the Malaysian GenZ undergraduates.