February 28 — 29, 2008 Advisory Committee Meeting
Avoiding Adverse Events Summary
Ken Powell, M.D., M.P.H., presented summary conclusions for
Major conclusions include:
The benefits of physical activity outweigh the risks of
adverse events. This is supported by Type 1, strong level evidence.
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.
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.
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.
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.
A safe environment reduces the risk of adverse events.
Evidence ranges from Type 1, strong evidence to Type 3a, moderate level
The incidence of musculoskeletal injuries attributed to
walking appears to be low. This is supported by Type 1, weak level evidence.