Abstract
Introduction
Type 2 diabetes (T2DM) is a diverse metabolic disorder characterised by persistent elevation of blood glucose that causes long-term vascular complications (cardiovascular disease, retinopathy, nephropathy and neuropathy) and premature mortality. 1 The number of people diagnosed with diabetes in Bahrain has risen from 9% in 2002 to 15% in 2022,2,3 and it has been estimated that the direct costs of treatment consume 20% of the country's total health expenditure. 4
Dietary restriction, sleep hygiene, stress management, increased physical activity (PA) and reductions in sedentary behaviour (SB) are the fundamentals of intensive lifestyle management in T2DM.5–7 The American College of Sports Medicine (ACSM) recommends that people with T2DM engage in regular PA and reduce sedentary time. 6 Recommended PA for adults is defined as ≥150 min of moderate-intensity (i.e., >3 metabolic equivalents [METs]) PA/week by the World Health Organisation (WHO). 8 Walking is the simplest form of PA; alternatively, it is recommended that adults aim for ≥4000 steps/day, and the more, the better. 9 Sedentary behaviour reduction is defined as limiting any waking behaviour characterised by an energy expenditure ≤1.5 METs while in a sitting, reclining or lying posture. 10 The benefits of adopting these changes in lifestyle behaviour include reduced HbA1C, triglycerides, blood pressure, insulin resistance and percentage of body fat8,11,12 and lower risk of all-cause mortality in T2DM.10,13
Low adherence to the ACSM's PA guidelines remains a major behavioural challenge.10,14 People with T2DM are more sedentary, do less PA, have lower cardiovascular fitness levels and are at higher risk for comorbid conditions that may affect mobility (e.g., sarcopenia and diabetic foot ulcers) compared to people without diabetes.13,15,16 There are limited PA and SB data for people with T2DM in the Eastern Mediterranean Region, but it is estimated that at least 65% do not meet recommended PA guidelines, with very little data on SB.17–20 Similarly, there are limited current data about the amount of PA currently done by adults with T2DM in Bahrain 21 ; these data have been collected using self-reported measurements.
Understanding the PA and SB patterns in Bahraini adults with T2DM is an essential first step towards our long-term goal of planning and developing a 10-week PA intervention. Evidence suggests that adults overestimate their PA compared to objective measurements over seven days. 22 On the other hand, wearing tracker devices can increase PA in the short term.23–25 Furthermore, hot and humid weather, environmental conditions and cultural events can impact PA in the Eastern Mediterranean Region. 26
Our aim was to study patterns of PA and SB and the influence of demographics and body mass index (BMI) on these behaviours amongst Bahraini adults with T2DM over 10 weeks using an activity tracker.
Methods
Study design
The study was a cross-sectional observational design of 10 weeks duration (Figure 1), from January to April 2019.

Overview of the study.
Study sample
Participants were recruited at Mohammed Jassim Kanoo Health Centre, in the 5th health region, Kingdom of Bahrain.
Sample size
We estimated the sample size for our study based on the following calculations and assumptions. For a national study, we calculated the sample size required as 340 patients using an estimated 30% prevalence of meeting WHO PA recommendations, 95% confidence limits, a precision of 5% and a dropout rate of 5%. As a proportion of all Bahraini people with T2DM attending primary health care centres, Mohammed Jassim Kanoon Health Centre received 5.4%, based on data from 2021. Therefore, we estimated the sample size as
Inclusion criteria
T2DM (i.e., HbA1c 6.5–9.0%) controlled with medication in the four months prior to participating in the study
Age 30–60 years. This age range was chosen because (i) ∼6.6% under 44 years self-reported having diabetes in the most recent Bahrain National Health Survey 28 ; (ii) adults over 60 years old had older models of mobile phones that often lacked Bluetooth technology, making it difficult to pair the Fitbit or track their data.
No chronic disease apart from minor complications of T2DM
Willingness to wear the fitness tracker wristband continuously (24 h/day) for 10 weeks
Cognitive ability to give informed consent to participate
Exclusion criteria
Taking insulin to control T2DM
Female participants who were pregnant or breastfeeding
Participants with any medical condition(s) which reduced their ability to stand or mobilise
Presence of significant diagnosed disease unrelated to T2DM
Inability to read and understand Arabic or English language
Recruitment
Whether a patient met the study criteria for inclusion was determined by the gatekeeper, a diabetologist at the health centre and not a part of the research team. In addition, a specialist nurse at the health centre confirmed whether each patient met the criteria during a regular visit and, if so, provided them with a leaflet summarising the study in English and Arabic. Those who were interested contacted one of the researchers to learn more about the study. An orientation session was organised for interested individuals, where they were shown a short video providing an overview of the study in English and Arabic and given a copy of the Participant Information Leaflet. Written informed consent was provided by all participants prior to the initiation of the study.
Demographics
Basic demographic information about age, sex, marital and employment status, and education were collected from each participant's electronic health records.
Body mass index
Height and weight measurements were conducted during visit 1 by PW using a combined stadiometer and weighing scale (Seca 700; Seca GmbH & Co. KG., Germany). The BMI was calculated as weight divided by the square of the height (kg/m2). Standard categories of body weight status were applied (underweight: <18.50 kg/m2; normal weight: 18.50–24.99 kg/m2; overweight: 25.00–29.99 kg/m2; obese: ≥30.00 kg/m2). 29
Physical activity tracker
Physical activity was measured using the Fitbit Flex 2TM device (Fitbit Inc.; San Francisco, CA), which has a three-axis accelerometer to count steps and has moderate to high validity with a tendency to undercount steps and underestimate moderate and vigorous PA.30,31 The SmartTrack feature on Flex 2TM automatically recognises and records high movement activities such as running, aerobic exercises and cycling. 32
Participants were provided with the device and instructed on using, charging and synchronising it's data to the Fitbit App. During visit 1, the Fitbit App was downloaded onto each participant's smartphone and synchronised with the device. Participants were instructed to wear the device throughout the study and remove it only when charging to obtain reliable and valid data for analysis. 33 No alarms or reminders were set up on the device. Continuous wear was necessary because we also collected data on sleep patterns; these are not reported in this article.
Participants’ Fitbit accounts were added manually to the research project account assigned by Fitabase (https://www.fitabase.com/). Fitabase is a third-party data management company designated to remotely collect Fitbit data from all selected research Fitbit accounts on behalf of the study. Fitabase generates access to the data sets but does not process them
We categorised average daily step count for the entire 10 weeks as sedentary (<5000), low PA (5000
At the end of the 10 weeks, each participant was sent their data, and then the study-assigned Fitbit accounts were deleted from the Fitabase service. Fitabase automatically deleted all data and backups related to these accounts 90 days after their removal from the Fitabase service. Finally, participants were instructed to create a new Fitbit account for their personal use if they wished to continue using the device.
Anonymity of participants
Each participant was assigned a unique identification code. This code was used when setting up each participant's research Fitbit account and replaced their name in the email address required for the account. Only one of the researchers had access to the information associated with each identification code, such as the unique email address assigned to the Fitbit device, their age, sex, height and weight. No other identifying information about the participant was included in the participants’ research Fitbit accounts. Finally, a dedicated phone number was used in the study so that participants could contact one of the researchers for troubleshooting and queries.
Statistical analysis
Descriptive statistics were used to compute the frequency, percentages, mean and standard deviations. For PA data, we calculated weekly averages and the average over 10 weeks, including none wear periods during waking hours. The normality of data distribution was assessed by the Kolmogorov-Smirnov test. The Chi-square or Fisher's exact probability tests were used to assess the statistical differences in categorical data. Differences in the mean or median of continuous values were analysed using a
Results
Thirty-two participants completed the study. One participant was excluded from the analysis because they did not have a suitable smartphone which could download the Fitbit app.
Demographics and BMI at baseline
Table 1 shows the basic demographic data of the study participants at baseline. There were more females (
Demographics and body mass index at baseline.
Demographic data expressed as number and percent; age and body mass index (BMI) data expressed as mean and standard deviation.
T2DM: people with type 2 diabetes.
Adherence rate and wear time
Over the 10 weeks of the study, 90.63% of participants achieved a wear time for the Fitbit of ≥10 h/day during waking hours. Based on the number of days the Fitbit device was worn continuously over 10 weeks, the mean adherence rate was 78.61 ± 35.41%. Non-parametric tests indicated that the adherence rates were not different for categories of gender, age groups, BMI, marital status, employment status and educational status.
Physical activity
Mean daily step count
Over 10 weeks, the average steps per day were 7859 ± 4131 for the entire sample. There were no significant differences between step count at baseline (7495 ± 3797), week 5 (7981 ± 4125) and week 10 (8381 ± 4846) (

Comparison of daily step count between males and females.
Frequency distribution for daily step count
The largest category was sedentary lifestyle (<5000 steps/day), with 31.3% of the participants. Nineteen percent were low active (5000–7499 steps/day). However, only 16% had a highly active lifestyle (>12,500) (Figure 3).

Frequency distribution for daily step count.
A generalised linear model was performed to analyse variability in PA across the demographic variables. The variables gender, BMI category, education and employment status were considered for analysis; however, education and employment status were later removed from the adjusted analysis. Gender and BMI categories were considered for the model for PA (Nagelkerke
Intensity of mean daily PA
The daily average sedentary time was 786 ± 109 min. Light PA time was 250 ± 76, moderate PA was 9 ± 10 and vigorous PA was 12 ± 18 min. Repeated measures ANOVA showed no significant differences between time points (baseline, mid-point and end of 10 weeks) in sedentary time, light activity time, moderate activity time or vigorous activity time. Non-parametric tests indicated that the intensity of daily PA did not vary significantly for demographic variables, including BMI, education, marital and employment status. However, males had a higher means of moderate (13 ± 9 vs. 5 ± 9,

Comparison of average daily physical activity intensity between males and females.
Discussion
This is the first study to collect device-assessed PA data of Bahrain adults with T2DM. The mean daily step count was ∼7860, and there were no differences between baseline, week 5 and 10. Females accumulated fewer average daily steps than males (6728 vs. 10,281). Males had higher daily means of moderate and vigorous activity than females (13 vs. 5 min and 21 vs. 5 min, respectively). Aside from sex, none of the other demographic variables (BMI, education, employment or marital status) influenced PA. The average sedentary and light PA times were 786 and 250 min, respectively. The attrition rate was 3%, and 91% of participants wore the device for at least 10 h/day. The adherence rate was 79% based on the percentage of days the device was worn continuously over the 10 weeks.
Sample characteristics
In our study sample, there were more females (
Attrition, adherence rate and wear time
The attrition rate in our study was 3% (
In this study, we have provided the recommended minimum reporting (i.e., adherence data, validity period and PA data) for research studies. 38 As regards adherence, 90.63% of participants wore the Fitbit for ≥10 h/day during waking hours, and these data compare favourably with recommendations for the validity of wear time to estimate PA. 38 Based on the number of days the Fitbit device was worn continuously over 10 weeks (except when it was charging), the mean adherence rate was 78.61 ± 35.41%. However, few studies report adherence rate, 39 making conclusions difficult. Attrition, wear time and adherence data may have been influenced by the text messages we sent to participants reminding them to wear the Fitbit device, synchronise their data and troubleshoot any technical difficulties, although this would require further investigation. However, there was no evidence that text messages influenced the average daily step count over the 10 weeks of the study. Overall, our data suggest that developing a PA intervention for people with T2DM using a tracker device in Bahrain would be feasible.
Average steps per day
At baseline in our study, the average steps/day was 7859, which can be classified as ‘somewhat active’ [7500–9999 steps/day]34,40; this is a positive and unexpected finding from our study. The average steps/day was higher than the previous ∼5000 steps/day reported for the T2DM population 15 and exceeds the recommended daily thresholds of ∼4000 steps for reducing all-cause mortality and 2337 steps for cardiovascular mortality irrespective of age, sex or climate. 9 However, 31% of our sample were sedentary, when defined as <5000 steps/day, supporting previous studies that people with T2DM tend to do less PA than those without. 13 Therefore, our future exercise intervention programme should support those Bahraini people with T2DM who are not achieving the minimum threshold for health benefits. Our results also show that females accumulated a lower average step count/day than males (6728 vs. 10,281, respectively). However, we did not explore the reason(s) (i.e., barriers and enablers) for the difference between males and females, and this is worthy of future study before designing any future exercise intervention programme.
Finally, in our study, PA (steps per day) and intensity of PA were not different between time points and therefore there was no evidence that wearing the Fitbit
Intensity of PA
Current WHO guidelines are for adults to engage in ≥150 min/week of moderate-intensity PA (e.g., walking at a moderate or brisk pace on a level surface) or ≥75 min/week of vigorous-intensity PA (e.g., race walking, jogging or running), 43 or any combination of these, for health benefits, including improved blood glucose control in T2DM.8,11 Public health campaigns often advise adults to achieve these PA goals in bouts of ≥30 min/day over five days of the week. 44 In our sample, males achieved these daily PA recommendations through 13 min of moderate- and 21 min of vigorous-intensity PA. These findings are similar (moderate PA: ∼16 min/day; vigorous PA: 9 min/day) to those reported in a study of people with type T2DM using a Fitbit device in Saudi Arabia. 20 However, in our study, females only accumulated 5 min of each intensity per day and were well below the recommendations for PA. Similar findings have been reported for females with diabetes in a survey conducted in Saudi Arabia 18 and a large survey in the USA. 45 However, in contrast to the US survey, we did not find a relationship between low PA and other demographic variables.
In our study, participants accumulated most of their daily PA through light intensity PA (250 min/day). This PA data likely reflects activities of daily living or social activities that included walking. As regards a future exercise intervention, one approach to improving PA in our target population would be to capitalise on this preference for walking and focus on steps per day as a target based on the findings of Banach
Sedentary time
In our study, the average sedentary time was ∼786 min/day based on METs. A systematic review on SB in adults with T2DM reported objectively measured sedentary time of 11–15.4 h/day (or 660–924 min/day), higher than those without the condition. 15 Our data are concerning because sedentary times of ≥9.5 h/day or 570 min/day are associated with a significantly higher risk of death. 48 Adults are recommended to replace sedentary time with PA of any intensity (including light intensity) for health benefits; the public health message is simple, ‘sit less and move more’, 8 and this would need to be emphasised to patients in our planned future exercise intervention.
Limitations
Our study focuses on a single health centre and may not represent all people with T2DM in Bahrain. However, the results provide insight into objectively measured PA in adult Bahraini people with T2DM. Although we collected PA data over 10 weeks, we scheduled the study to avoid Ramadan (traditionally a month of significant changes in PA patterns) and the hotter summer months when we anticipated the participant dropout rate would be significant. 26 However, for our future intervention study, it would be important to know the dropout rate for our target population during Ramadan so that we could plan accordingly. Before the start of the study, we did not know how much and what intensity of PA our participants were currently undertaking. To reduce the risk of any hypo- or hyperglycaemic events, we excluded people on insulin therapy because we were not planning to monitor their blood glucose during the study. However, monitoring will be conducted during our future intervention study, and therefore, we will include people with T2DM on insulin therapy because the benefits of regular PA are known to outweigh this risk. 49
The Fitbit Flex provides comparatively accurate estimates of sedentary time and has moderate validity for measuring PA with a tendency to undercount steps and underestimate moderate and vigorous PA, compared to the Actigraph GT3X + accelerometer.30,31,50 This undercounting or underestimation may be partly due to the device having a preset walking and running stride length, although it can be adjusted in the Fitbit App if stride length is calculated for each user; we did not do this in our study. 32 A limitation of the SmartTrack feature for research purposes is that it is not entirely clear how Fitbit processes user data to detect higher movement activities. Although other newer devices may have been more suitable for tracking activity in our target population, we chose the Fitbit Flex 2 because of costs and also because it is waterproof, which meant it could be worn continuously, even during ablutions.
Wearing tracker devices increases PA in the short term, partly due to the continuous data they provide participants.23,24 The Fitbit Flex 2 has an LED feature that allows the user to chart their progress towards a daily activity goal, and the user can also see their step count per day when they synchronise the Fitbit to their smartphone. 32 However, we did not observe a significant change in daily step count or intensity of PA across the 10 weeks of the study. The reason for this is unclear and worthy of further investigation, but it is important to note that we did not highlight or encourage participants to use these features.
Conclusions
We have studied patterns of PA and SB and the influence of demographics and BMI on these behaviours amongst Bahraini adults with T2DM over 10 weeks using an activity tracker.
The average steps/day were higher than reported in previous studies of people with T2DM. However, a third of participants were sedentary based on their step count and females accumulated fewer steps per day than males. Furthermore, although males achieved the WHO threshold recommendations for moderate-to-vigorous intensity PA, females did not. Our future planned intervention programme needs to target these two subgroups, but before that, we need to understand their facilitators and barriers to PA and whether they would prefer to focus on low-intensity PA and increase their steps per day or increase the amount of moderate-to-vigorous intensity PA. Both males and females had high sedentary times; therefore, the intervention study must include an educational component about the importance of sitting less and moving more.
