Background This paper is a follow‐up study continuing the COVISTRESS network previous research regarding health‐related determinants. Objective The aim was to identify the main consequences of COVID‐19 lockdown on Body Mass Index and Perceived Fragility , related to Physical Activity (PA), for different categories of populations, worldwide. Design The study design included an online survey, during the first wave of COVID‐19 lockdown, across different world regions. Setting and participants The research was carried out on 10 121 participants from 67 countries. The recruitment of participants was achieved using snowball sampling techniques via social networks, with no exclusion criteria other than social media access. Main outcome measures Body Mass Index , Physical Activity , Perceived Fragility and risk of getting infected items were analysed. SPSS software, v20, was used. Significance was set at P < .05. Results Body Mass Index significantly increased during lockdown. For youth and young adults (18‐35 years), PA decreased by 31.25%, for adults (36‐65 years) by 26.05% and for the elderly (over 65 years) by 30.27%. There was a high level of Perceived Fragility and risk of getting infected for female participants and the elderly. Correlations between BMI , Perceived Fragility and PA were identified. Discussion and Conclusions The research results extend and confirm evidence that the elderly are more likely to be at risk, by experiencing weight gain, physical inactivity and enhanced Perceived Fragility. As a consequence, populations need to counteract the constraints imposed by the lockdown by being physically active.

Background: As an accessible and inexpensive activity in daily life for employees, transport-related walking is a promising focus of physical activity initiatives. The purpose of this study was to integrate worksite neighbourhood walkability with the theory of planned behaviour (TPB) to predict transport-related walking in Chinese employees using a longitudinal design. Methods: A sample of 157 employees (M age = 33.26 years; SD = 7.18) reported their social cognition and worksite neighbourhood environment perceptions at the baseline. Self-reported transport-related walking was measured at two time points, 1 month apart. Results: Path analyses revealed that intention had a direct effect on walking, while attitudes, subjective norm, and perceived behavioural control had indirect effects on walking via intention. Past behaviour had a significant effect on walking, attenuating the intention-behaviour effect substantially. However, there was no indirect effect from perceived worksite neighbourhood walkability on walking through the TPB constructs. Furthermore, perceived neighbourhood walkability did not moderate the intention-walking relationship. Conclusions: Perceived worksite neighbourhood walkability had limited effects on transport-related walking, which seems to be a motivated and habitual behaviour. Habit-based interventions may be a priority over social cognitive and environmental change interventions, and future experimental studies are needed.