The effects of enrichment on parameters in hypertensive rats (2000)

Lawson, D. M., Churchill, P. C., Churchill, P. C.

Abstract

The study showed that male SHR rats who were each housed with another rat were more active and had a higher systolic pressure than did similar animals housed alone. Diastolic blood pressure or heart rate did not differ. .. Separation from a cage mate clearly induced the greatest activation, causing sustained increases in systolic and diastolic pressure and heart rate.