The relationship between physical activity and mental health of middle school students: the chain mediating role of negative emotions and self-efficacy

Interest in the problem of method biases has a long history in the behavioral sciences. Despite this, a comprehensive summary of the potential sources of method biases and how to control for them does not exist. Therefore, the purpose of this article is to examine the extent to which method biases influence behavioral research results, identify potential sources of method biases, discuss the cognitive processes through which method biases influence responses to measures, evaluate the many different procedural and statistical techniques that can be used to control method biases, and provide recommendations for how to select appropriate procedural and statistical remedies for different types of research settings.

There is a growing body of literature that recognizes the positive effects of exercise on mood states such as anxiety, stress and depression, through physiological and biochemical mechanisms, including endorphins, mitochondria, mammalian target of rapamycin, neurotransmitters and the hypothalamic-pituitary-adrenal axis, and via the thermogenic hypothesis. In addition, psychological mechanisms influence the effects of exercise on mood states, as suggested by both the distraction hypothesis and the self-efficacy hypothesis. Exercise has also been shown to reduce inflammation via several different processes (inflammation, cytokines, toll-like receptors, adipose tissue and via the vagal tone), which can contribute to better health outcomes in people suffering from mood disorders.

The COVID-19 pandemic has potentially a serious impact on many people's mental well-being. This study analyses the influence of the perceived threat of COVID-19 on subjective mental well-being with an online survey (n = 711). Findings confirmed the hypothesized model that provides a process explanation for this effect through the mediating influence of the activation of future anxiety. In addition, results confirmed that this influence via future anxiety is moderated by resilience, a personality trait that enables individuals to cope better with stressful or traumatic events. Individuals with higher levels of resilience compared to those with lower levels registered a lower impact of perceived Covid threat on future anxiety and, in turn, on subjective well-being. This study contributes theoretically to a better understanding of the factors that determine the impact of traumatic events such as a pandemic on people's mental health. The implications of this study indicate interventions that may be carried out to minimize the pandemic's negative psychological consequences.