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Physical Activity Guidelines

February 28 - 29, 2008 Advisory Committee Meeting Minutes

Avoiding Adverse Events Summary

Ken Powell, M.D., M.P.H., presented summary conclusions for adverse events.

Major conclusions include:

  1. The benefits of physical activity outweigh the risks of adverse events. This is supported by Type 1, strong level evidence.

  2. The benefits of regular physical activity outweigh the risk of sudden adverse cardiac events during activity. This is supported by Type 1, strong level evidence.

  3. Proper attention to the key factors of any physical activity program can substantially reduce the risk of adverse events. For type of activity, this is supported by Type 3a, strong evidence. For dose of activity, this is supported by Type 2, strong evidence. Finally, rate of change in activity is supported by Type 1, strong evidence.

  4. A series of small increases in activity each followed by a period of adaptation will cause fewer adverse events than larger or more frequent increases. This is supported by Type 4, weak level data.

  5. Appropriate clothing, gear and equipment reduce the risk of adverse events. The level of evidence ranges from Type 3a, strong evidence to Type 4, weak evidence.

  6. A safe environment reduces the risk of adverse events. Evidence ranges from Type 1, strong evidence to Type 3a, moderate level evidence.

  7. The incidence of musculoskeletal injuries attributed to walking appears to be low. This is supported by Type 1, weak level evidence.

 

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