Perhaps you should try some spelling variations:
training decreases » training increases (Expand search)
decrease training » increased training (Expand search), disease training (Expand search), release training (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease hiv (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
the basal » the nasal (Expand search), the basic (Expand search), the basis (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease risk decrease in decrease ) OR ( decrease training decreases the basal ))~.