In our modern, technology-driven age, an ever increasing
number of labor-saving conveniences and gadgets
contribute to the reduction in average daily energy
expenditure that favors the development of obesity.
Although physical activity and exercise are factors in
successful weight reduction programs, the contribution
of exercise to weight loss is modest at best. For example,
approximately 40 miles of walking is required to metabolize
1 kg of fat. The effect of exercise on weight loss is
variable, but most studies I have been shown, interpreted
by researches themselves, only a small reduction
(;2 kg)and some show no benefit at all.
Furthermore, most studies show that weight loss induced
by exercise alone is inferior to that achieved by diet
alone. However, exercise is probably independently
important to the well-being of overweight and
obese individuals because physical activity increases maximal
oxygen uptake and thus cardiorespiratory fitness.
Moreover, maintenance of weight loss is
facilitated by regular exercise. Unfortunately, the unrealistic
expectations of weight loss from exercise regimens
that are promoted by many commercial enterprises
may lead to disappointment and discontinuation of exercise.
Development of a consistently achievable exercise
program for each overweight patient is essential. Although
it is difficult, even the most obese patients may
be able to participate in some form of appropriately
designed physical activity. To point, exercise is always preferential but
due to the fact that regular exercise may be both difficult, expensive and
time consuming, most Americans achieve weight loss/control without it.
Let's not forget that the greatest value of aerobic (O2 dependent) exercise
is for the health of the cardiorespiratory system. Anaerobic strength
training enhances functionality of movement (if properly designed)
especially as a person gets older and creates/keeps certain abilities that
will be useful in remaining self-determining and maintaining.