Exercise for fitness does not decrease the muscular inactivity time during normal daily life

Abstract

Exercise for fitness does not decrease the muscular inactivity time during normal daily life Finni Juutinen, Taija; Haakana, Piia; Pesola, Arto; Pullinen, Teemu Finni Juutinen, T., Haakana, P., Pesola, A., & Pullinen, T. (2014). Exercise for fitness does not decrease the muscular inactivity time during normal daily life. Scandinavian Journal of Medicine and Science in Sports, 24 (1), 211-219. doi:10.1111/j.1600-0838.2012.01456.x The time spent in sedentary behaviors has been shown to be independent of exercise in epidemiological studies. We examined within an individual whether exercise alters the time of muscular inactivity within his/her normal daily life. Quadriceps and hamstring muscle EMG activities and heart rate were measured during 1-6 days of normal daily living of ordinary people. Of 84 volunteers measured, 27 (15 men, 12 women, 40.7±16.5 years) fulfilled the criteria of having at least one day with and one day without exercise for fitness (total of 87 days analyzed, 13.0 ± 2.5 h/day).Reported exercises varied from Nordic walking to strength training and ball games lasting 30-150 min (mean 83±30min). Exercise increased the time spent at moderateto-vigorous muscle activity (6±4% to 9±6 %, p<0.01) and energy expenditure (13±22 %, p<0.05). Muscular inactivity, defined individually below that measured during standing, comprised 72±12% of day without and 68±13% of day with exercise (n.s). Duration of exercise correlated positively to the increase in moderate-tovigorous muscle activity time (r=0.312, p<0.05) but not with inactivity time. In conclusion, exercise for fitness, regardless of its duration, does not decrease the inactivity time during normal daily life. This is possible by slight modifications in daily non-exercise activities.

The importance of non-exercise physical activity for cardiovascular health and longevity

“…Epidemiological studies have implied that in today’s society it is not only possible, but also very common, to exercise regularly yet be highly sedentary during the day (an ‘active couch potato’), and in the present study, there was a rather low association between NEPA and exercise. Finni et al 28 studied how sedentary and NEPA time varied between days with and without intentional exercise by measuring electromyography activity in the quadriceps and hamstring muscle and found that a day including exercise did not significantly alter the time distribution between sedentary pursuits and NEPA, compared to a day without exercise.…”

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“…Accordingly, any activity that decreases inactivity time, like sitting, may benefit health [1][2][3][4][5]13]. …”

“…Finni et al [4] have shown that exercise for fitness, regardless of its duration, does not decrease the inactivity time during normal daily life. Further, different counseling interventions have been carried out to decrease sedentary behavior [5].…”

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