Coronavirus is part of a group of viruses responsible for seasonally causing acute respiratory syndromes that can be accompanied from mild symptoms to severe conditions with a significant mortality rate. In addition to hygiene care, social distance is one of the most efficient strategies to mitigate the spread of the virus and reduce impacts on the world. Therefore, government strategies have directed efforts to ensure the isolation at home of much of the world’s population. One of the strategies that has been considered an important tool to facilitate adherence to isolation is the encouragement of regular physical exercise, especially due to its ability to reduce feelings of anxiety and stress in the population. Thus, in parallel with the expansion of coronavirus in the world, the search for exercise at home has gained prominence on the internet, demonstrating the emerging need to think of strategies that can lead to an effective home practice in promoting adherence to a physically active lifestyle. On the other hand, some pertinent questions may arise, such as: how will the exercise prescription and follow-up of the population be carried out during this period? What guidelines should be followed for a safe and efficient prescription? What types of exercises should be prioritized? What are the criteria for this selection? Based on these questions, this study aimed to present a proposal, integrating the physiological and psychobiological aspects, of how physical exercise could be prescribed at home, considering the barriers faced by the population in the face of social isolation worldwide. In summary, here we suggest a prescription model that estimates the weekly performance of at least 150 minutes of aerobic exercises, as well as strength exercises for the main muscle groups. In addition, we guide the use of tools that allow the assessment of physical effort and personal satisfaction in training, with the aim of improving adherence and maintenance to a physical exercise program and thus contributing to health promotion during the COVID-19 pandemic.Palavras-chave: exercice prescription, home training, lifestyle, pandemic Covid-19

This study evaluated whether transcranial direct current stimulation (tDCS) could change physiological and psychological responses during vigorous exercise with a constant load. 13 sedentary males (23.0±4.2 years; 25.6±4.2 kg/m²) took part in this randomized, crossed-over, sham-controlled, and double-blinded study. Participants underwent 2 sessions with anodal or sham tDCS (2 mA, 20 min) applied before exercise over the left temporal cortex targeting the left insular cortex. The exercise was performed at vigorous intensity (%HR 81.68±6.37) for 30 min. Heart rate (HR), rating of perceived exertion (RPE) and affective responses (pleasure/displeasure) were recorded at every 5 min. Additionally, heart rate variability (HRV) was measured before, immediately after and 60 min after the end of exercise. A 2-way repeated measure ANOVA showed that tDCS improved HRV neither at rest nor after exercise (p>0.15). Similarly, HR, RPE, and affective responses were not enhanced by tDCS during vigorous exercise (p>0.23). The findings of this study suggest that tCDS does not modulate either HRV at rest nor HR, RPE and affective responses during exercise. Transcranial direct current stimulation's efficiency might depend on the participants' levels of physical fitness and parameters of stimulation (e. g., duration, intensity, and arrangement of electrodes).

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Affective responses and enjoyment of exercise mediate exercise adherence, but previous research findings have failed to examine nuances that may moderate this relationship. We examined the effects of exercise on affective and enjoyment responses during and post exercise through a systematic literature review and meta-regression analysis. We searched major databases up to July 9, 2020 for studies evaluating healthy adults’ acute and chronic responses to exercise, using either of The Feeling Scale or Physical Activity Enjoyment Scales. We calculated effect size (ES) values of 20 unique studies (397 participants; 40% females) as standardized differences in the means and expressed them as Hedges’ g, together with the 95% confidence interval (95%CI). Among acute studies examining affective responses, we found a greater positive effect post exercise for continuous training (CT) compared to high intensity interval training (HIIT) ( g = −0.61; 95%CI = −1.11, −0.10; p < .018), but there was no significant difference between these modes for effects during exercise. Subgroup analyses revealed that moderate, and not high intensity, CT, compared to HIIT, resulted in significantly greater positive affective responses ( g = −1.09; 95%CI = −1.88, −0.30; p < .006). In contrast, enjoyment was greater for HIIT, compared to CT ( g = 0.75; 95%CI = 0.17, −1.13; p = .010), but CT intensity did not influence this result. Among chronic studies, there was greater enjoyment following HIIT compared to CT, but these studies were too few to permit meta-analysis. We concluded that an acute bout of moderate intensity CT is more pleasurable, when measured post exercise than HIIT, but enjoyment is greater following HIIT, perhaps due to an interaction between effort, discomfort, time efficiency and constantly changing stimuli.

The world has been experiencing a pandemic period caused by COVID-19 since March 2020. Many sporting events were suspended or canceled which interfered with the athletes' lives. Athletes with disabilities, depending on the pathology profile, may be more susceptible to major complications from COVID-19 infection. Thus, the entire family and club structure must adopt strategies to prevent the contagion that permeates social isolation and information about returning to training.