## 4 Discussion  
Our study aimed to present the methodological procedures of the program \"U3A in Motion\", composed of videos of physical exercises and activities to promote the mental health and well-being of the Brazilian older adult population during the COVID-19 pandemic. We have shown that the program directly reached a considerable number of older adult U3 As and older people's institutions in the city where the program originated. Furthermore, due to the use of technology, mainly WhatsApp, the videos reached the homes of a large number of older adults in the southern region of Brazil. Through the analysis of the testimonies, it was possible to attest that the suggestions of varied physical exercises, as well as the psychosocial activities, had a positive impact on the physical and mental health of the users. During the COVID-19 pandemic, telehealth services were suggested to facilitate health policies [45; 49]. Among the advantages of using telecommunication technology was the facility for long-distance health care (remote mode), especially for geographically vulnerable groups, or in the case of a pandemic, for individuals isolated in their homes. A systematic review carried out before the period of the COVID-19 pandemic showed that eHealth users were able to promote higher levels of PA than those who did not use the technology [58]. However, it is worth noting that factors such as the type of exercise, age group, and sex can influence the individual's behavior with PA [59]. In the area of physical exercises, the eHealth tools found are digital, online, and Internet-based. Among the operators there are watches, apps, websites, videos, communities, and social media [60]. In general, these tools were created to help people exercise, benefiting their PA levels. In turn, the measure meets the recommendations to combat sedentary behavior [35]. According to the testimonies of participants in the \"U3A in Motion\" program, the videos brought guidance and motivation for older adults to become more physically active, gaining vitality, perceived by the improvement in muscle strength, balance, motor coordination, in addition to relaxation and pain reduction. According to testimonies, there was an improvement in physical and mental well-being. Another point highlighted by older adults was that the tips provided by the videos on how to manage free time strengthened intergenerational relationships in families. In a previous study carried out in 2020 with U3A/UNIVASF students (n = 35; 70.5 \(\pm\) 4.7 years) to verify whether they were sufficiently informed about the ways in which the virus is transmitted, as well as knowing the impacts of social isolation on quality of life [22], the testimonies brought to light a series of concerns of the older adults. Despite feeling well informed, older adults revealed a high degree of concern about the possibility of being infected by the virus and dying prematurely. Consequently, this made them anxious, causing mood swings, poor sleep quality, and loss of appetite and body weight. Another highlighted point was that due to the collapse of the Brazilian economy during the pandemic, family members had lost their jobs, and this raised the concern of older adults. Participants of the \"U3A in Motion\" program revealed in their statements that the videos helped to harmonize moments of tension in everyday life. Moreover, even people who did not exercise regularly before the pandemic said that they intended to change their habits and become physically active when everything returned to normal. Our findings were in line with studies showing that measures with the use of mobile phones (WhatsApp) and social media (Instagram) were effective in promoting the health of older adults during the lockdown period [45; 49]. In a study carried out with adult individuals who were working from home during the pandemic, classes were offered in synchronous mode through a smartphone application to promote health and physical conditioning [61].