Proximity of food, sex, and access to running wheels.
D000818:Animals; D001522:Behavior, Animal; D001835:Body Weight; D004032:Diet; D004435:Eating; D004777:Environment; D005260:Female; D008297:Male; D009043:Motor Activity; D005082:Physical Exertion; D051381:Rats; D012737:Sex Factors; D013395:Sucrose
D013395:Sucrose