Table 1.

Mortality among groups (likelihood ratio).

Group	N Total	Mortality (%)
C	11	36.4
ET	12	41.7
M	14	35.7
IR	12	33.3
M+N	9	33.3
ET+M	11	27.3
ET+N	7	42.9
p = 0.99

C  =  control; ET  =  exercise training; M  =  morphine; IR  =  intermittent ischemia-reperfusion; M+N  =  morphine plus naloxone; ET+M  =  exercise training plus morphine; ET+N  =  exercise training plus naloxone.