BACKGROUND Ecological momentary assessment (EMA) may elicit physical activity (PA) estimates that are less prone to bias than traditional self-report measures while providing context. OBJECTIVES The objective of this study was to examine the convergent validity of EMA-assessed PA compared with accelerometry. METHODS The participants self-reported their PA using International Physical Activi...

Our previous research indicated that an Internet intervention was effective in increasing self-reported physical activity in persons with multiple sclerosis (MS). The present study examined the efficacy of the same Internet intervention in persons with MS by using both objective and self-report measures of physical activity. Participants (N = 21) wore an accelerometer around the waist for 7 day...

The advancement of efficient technologies to comply with the needs of systems biology and drug discovery has so far not received adequate attention. A substantial bottleneck for the time-resolved quantitative description of signaling networks is the limited throughput and the inadequate sensitivity of currently established methods. Here, we present an improved protein microarray-based approach ...

PURPOSE Instruments to assess physical activity are needed for (inter)national surveillance systems and comparison. METHODS Male and female adults were recruited from diverse sociocultural, educational and economic backgrounds in 9 countries (total n = 2657). GPAQ and the International Physical Activity Questionnaire (IPAQ) were administered on at least 2 occasions. Eight countries assessed c...

BACKGROUND Validation of instruments used to measure physical activity patterns is essential when attempting to assess the effectiveness of physical activity interventions. OBJECTIVES To assess the validity of two self-report physical activity questionnaires on a representative sample of New Zealand adults. METHODS 70 adults aged 18-65 years from around Christchurch, New Zealand were requir...

BACKGROUND Many questionnaires for measuring physical activity (PA) exist. This complicates the comparison of outcomes. METHODS In 8 European countries, PA was measured in random samples of 600 persons, using the IPAQ as a 'bridge' to historical sets of country-specific questions. We assume that a unidimensional scale of PA ability exists on which items and respondents can be placed, irrespec...

Type 2 diabetes mellitus (T2DM) incidence has been increasing worldwide along with the rise of obesity and sedantery lifestyle. Decreased physical activity (PA) and obesity have also been associated with the low vitamin D levels. We aimed to determine the association between PA, vitamin D status and insulin resistance in overweight and obese subjects. A total of 294 (186 female, 108 male) overw...

A cross-sectional study was carried out on 1708 students from Mansoura University, Egypt, to describe the pattern of physical activity, predictors of physical inactivity and perceived barriers to and benefits of physical activity. The International Physical Activity Questionnaire (IPAQ) was used to measure physical activity. Data were analysed according to the guidelines for data processing and...

This paper presents the e-SUIT, a wearable computer incorporated in a traditional business suit. A key feature of the system is an array of input/output devices integrated into the garment. These devices are connected to a network bus incorporated into the suit jacket. The network connects the jackets sensors and I/O with a Compaq iPAQ operating Windows CE. The iPAQ is connected to the users p...