The effects of the COVID-19 pandemic on levels of physical fitness

SUMMARY

INTRODUCTION

The COVID-19 pandemic, caused by infections from a novel human coronavirus, has been reported since December 2019 in China but was only made official in March 2020. Since then, it has had an impact worldwide, both due to its aggressiveness and its fast propagation. Society has been facing this pandemic by following the recommendations and determinations of the WHO and the strategies deployed by governmental institutions. Among these, social isolation has been shown to be the most important, because when isolating, society tends to move less, with a consequent increase in physical inactivity and sedentary behavior, affecting its levels of physical fitness. The objectives of this review were: to review the most important effects of physical inactivity and sedentary behavior on the physical fitness levels of the population during the COVID-19 pandemic.

CONCLUSION

The role of a regular practice of activities on the levels of physical fitness is fundamental to define the balance of quality of life during a COVID-19.

Physical Fitness; Coronavirus Infections; Sedentary Behavior; Betacoronavirus

RESUMO

INTRODUÇÃO

A pandemia de COVID-19, causada pela infecção por novo coronavírus humano, foi notificada desde dezembro de 2019, na China, mas apenas oficializada em março de 2020 e, desde então, tem impactado nações do mundo inteiro, tanto pela sua agressividade quanto pela sua velocidade de propagação. A sociedade enfrenta a pandemia seguindo as recomendações e determinações da OMS e das instituições governamentais. Entre as estratégias de enfrentamento, o isolamento social se destaca como o mais importante, porque, ao se isolar, a sociedade tende a se mover menos, obtendo aumento da inatividade física e do comportamento sedentário, reduzindo seus níveis de aptidão física. Os objetivos dessa revisão foram: revisar os efeitos mais importantes da inatividade física e do comportamento sedentário sobre os níveis de aptidão física da população durante a pandemia de COVID-19.

CONCLUSÃO

O papel da prática regular de atividades físicas sobre os níveis de aptidão física se revela fundamental para estabelecer o equilíbrio na qualidade de vida durante a COVID-19.

Aptidão física; Infecções por coronavírus; Comportamento sedentário; Betacoronavírus

INTRODUCTION

The pandemic caused by infections from a new virus, known as new human coronavirus (COVID-19), was notified in December 2019, in China, but only formalized in March 2020 and, since then, has impacted nations throughout the world, both due to its aggressiveness and its speed of propagation¹ . The figures are alarming: on 3 June 2020, the World Health Organization confirmed 6,317,450 cases and 376,320 deaths worldwide² .

Society, still without a vaccine, has been handling the COVID-19 pandemic through various strategies, trying to strictly follow the recommendations by the World Health Organization (WHO) and the determinations of governmental measures, through extendable decrees focusing on: proportional emergency care, cleaning, disinfection, compulsory use of masks, social distancing, social isolation and, in certain cases, quarantine, and lockdown² .

Among these measures, social isolation determines that population should mainly at home, ceasing, thus, their working life, as well the regular practice of physical activity in their daily routine, leading to an increase in physical inactivity and sedentary behavior and its consequences.

Physical inactivity is characterized by a condition under which the recommended levels of physical activity of moderate and vigorous intensity (MVPA)³ are not reached, while sedentary behavior is characterized by the practice of activities with low energy expenditure: ≤1.5 metabolic equivalents (METs) ( Figure 1 ), for example, remaining in a sitting, leaning, or lying position over 8 hours per day, except for the period of sleep⁴ - ⁶ . Both are harmful to health and reduce the levels of physical fitness.

FIGURE 1
DIFFERENCE BETWEEN SEDENTARY, PHYSICALLY INACTIVE, AND PHYSICALLY ACTIVE BEHAVIOR. ADAPTED FROM MENEGUCI ET AL.4

The importance of maintaining in of physical fitness, through the practice of regular physical activity, needs to be better understood in its dimensions so that it can be properly recognized as an activity that is essential for health, in a consensus between society, science, and the government bodies since it is an excellent strategy for its positive effects on cardiovascular, metabolic, immunological, and mental health⁷ . Therefore, the objectives of this review were: to review the most important effects of physical inactivity and sedentary behavior on the levels of physical fitness of the population during the COVID-19 pandemic.

Levels of physical fitness

The levels of physical fitness have been analyzed by the American College of Sports Medicine, and in cases of its reduction or decline, the effects of aging accelerators would be revealed⁹ . Based on these studies, Table 1 gives an idea of what these adaptations would look like in conditions of physical inactivity during the COVID-19 pandemic:

TABLE 1
RELATIONSHIP OF ELEMENTS OF PHYSICAL FITNESS, ORGANIC EFFECTS, AND FUNCTIONAL IMPACTS OF PHYSICAL INACTIVITY.

Physical Fitness	Effect observed	Functional impact
Strength and Power of muscles	The levels of isometric and concentric strength decrease quickly during periods of physical inactivity. Power declines faster than Strength.	Deficits of strength and power are predictors of disability and increased risk of mortality
Endurance, Fatigability and Cardiorespiratory function	Endurance decreases. The maintenance of strength becomes difficult. The maximum aerobic power (MAP) decreases.	It can affect the recovery from repetitive daily activities; Cardiorespiratory system overload
Balance and Mobility	Changes in the sensory, motor, and cognitive patterns that would affect the biomechanics (sitting, standing, moving, etc.). These elements, added to the matter of environment limitations, would affect balance and mobility	Loss of balance causes fear of falling and may lead to a rejection of the practice of physical activity.
Performance and Motor control	Increases the reaction time (may lead to accidents). The speed of simple and repetitive movements may decrease Change in the control of gesture precision. Difficulty in performing complex tasks.	Impact on instrumental activities of daily living (IADL). Increases the likelihood of accidents and injuries.
Flexibility and Amplitude of Joint Movement	There is a marked decrease in the flexing degree of joints such as the hips, spine, and ankle	Little flexibility, increase risk of injury, decreased mobility, backache, and falls.

The increase in physical inactivity and sedentary behavior during the COVID-19 pandemic can be explained by two important reasons. The first relates to the fact that there were already existing cases of physical inactivity pre-pandemic, and the second is the transitory cases caused by the imposition of a essentially confined life, both converging in the decline of physical fitness⁷ .

These two reasons together may increase cases of complications and even deaths, both from reasons other than COVID-19. This may even lead to cardiovascular and respiratory complications, considering that physical inactivity is considered a risk factor for cardiovascular and metabolic diseases¹⁰ due to its correlation with increased blood pressure, blood glucose, and lipid profile¹¹ . The increase in physical inactivity associated with longer periods of sedentary behavior can also induce cardiovascular morbidity and mortality due to all the causes¹² . However, individuals who are physically active have significantly reduced mortality due to cardiovascular diseases, even with long periods of sedentary behavior¹³ , because they improve their cardiorespiratory fitness and prevent various chronic diseases¹⁴ .

Thus, being physically active and reducing sedentary behavior during the COVID-19 pandemic are essential to maintain levels of physical fitness, aiding in the balance and improvement of several physical valences, promoting a better quality of life and general health¹⁵ , in addition to reducing the risk of cardiovascular and metabolic diseases, at any time, including during the COVID-19 pandemic¹⁶ .

It is important to highlight that the elderly population is at a greater risk of complications and death during the COVID-19 pandemic, no matter how well preserved it is in social isolation, because the increase in physical inactivity and sedentary behavior, which reduces their levels of physical fitness, can make them more prone to cardiovascular events, and they may suffer from an accelerated organic and cognitive decline, including the possibility of falls due to postural imbalance.

In this context, in times of difficulty, with the goal of trying to maintain a normal behavior of physical activity practice to improve physical valences and physical fitness, the technologies normally associated to hypokinesia, currently, would have a beneficial and strategic role of virtually bringing together Physical Education professionals and their clients. Both groups are trying to adapt to this model of distant instruction, through applications, for the remote practice of physical activities and exercises, gathering in virtual social networks, through lives, pre-recorded lectures, audio classes, and various media elements¹⁷ .

However, the screen time, an important variable in the study of sedentary behavior¹⁸ , presents itself, at this moment, as a factor for future studies because individuals who spend too much time using devices such as laptops, phones, or TVs increase a component of sedentary behavior which is harmful to health and is associated with a risk of developing obesity¹⁹ ; on the other hand, technology can also be a tool to promote health and improve physical fitness, because games combined with movement and motivational elements, as already seen in the concept of exergaming²⁰ applied to technological exercise equipment, promote competitive games, racing simulations, among others, in the form of videogames or digital neurocognitive games known as brain games²² . Although both are composed of simultaneous elements of motivation and data monitoring, the latter would have more characteristics to reduce sedentary behavior.

Therefore, several strategies can be adopted to inhibit physical inactivity and reduce sedentary behavior during the COVID-19 pandemic, thus minimizing the risk of chronic-degenerative diseases, as well as of morbidity and mortality.

CONCLUSION

Practicing physical activities has a key role in the levels of physical fitness and is essential to balance and improve health and quality of life during the COVID-19 pandemic because it reduces the levels of physical inactivity and sedentary behavior.

Thus, the practice of regular physical activity is essential because it minimizes harmful effects on physical and emotional health during the pandemic, particularly by maintaining and/or improving the clinical condition of individuals who have chronic diseases.

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Publication Dates

• Publication in this collection
  21 Sept 2020
• Date of issue
  2020

History

• Received
  11 June 2020
• Accepted
  12 June 2020