Key Question 4: Harms
Adverse effects were rarely noted in physical activity
counseling trials. Two trials reported minor muscular
symptoms (27, 50), and 3 trials reported falls related to
physical activity (31, 53, 54). We also found 7 casecrossover
analyses, which showed that the risk for a cardiac
event is increased 2-fold to 17-fold during vigorous exercise
(126 –132). This increased risk was much greater for
people with low baseline levels of regular activity. Nevertheless,
the absolute risk for a cardiac event during physical
activity was very low. One of these studies estimated that
the incidence of sudden death associated with vigorous
physical activity was 1 per 1.42 million person-hours of
exercise (126).
We found no studies designed to assess the adverse
effects of dietary counseling or the adverse effects of increasing
intake of fruits and vegetables or fiber and decreasing
intake of sodium or fat. None of the healthful diet
counseling trials reported specific adverse events.
Key Question 4: Harms
Adverse effects were rarely noted in physical activity
counseling trials. Two trials reported minor muscular
symptoms (27, 50), and 3 trials reported falls related to
physical activity (31, 53, 54). We also found 7 casecrossover
analyses, which showed that the risk for a cardiac
event is increased 2-fold to 17-fold during vigorous exercise
(126 –132). This increased risk was much greater for
people with low baseline levels of regular activity. Nevertheless,
the absolute risk for a cardiac event during physical
activity was very low. One of these studies estimated that
the incidence of sudden death associated with vigorous
physical activity was 1 per 1.42 million person-hours of
exercise (126).
We found no studies designed to assess the adverse
effects of dietary counseling or the adverse effects of increasing
intake of fruits and vegetables or fiber and decreasing
intake of sodium or fat. None of the healthful diet
counseling trials reported specific adverse events.
การแปล กรุณารอสักครู่..