| 1 | (substance OR alcohol OR drug OR opioid) AND (abuse OR misuse OR withdrawal OR abstinence OR addict OR craving OR dependency OR illegal OR illicit OR overdose OR prevention OR user OR recreational OR recovery) AND (exercise OR "physical activity") Select: "primary research" in sidebar |
| 2 | (substance OR alcohol OR drug OR opioid) AND (abuse OR misuse OR withdrawal OR abstinence OR addict OR craving OR dependency OR illegal OR illicit OR overdose OR prevention OR user OR recreational OR recovery) AND (fitness OR sedentary) Select: "primary research" in sidebar |
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