controlled carbohydrate content diet (69 %) (for 63 days) and controlled fat content diet (12 %) (for 63 days) and controlled protein content diet (19 %) (for 63 days) then controlled carbohydrate content diet (53 %) (for 28 days) and controlled fat content diet (14 %) (for 28 days) and controlled protein content diet (33 %) (for 28 days) then phenylephrine (1 umol/l) then sodium nitroprusside (0-9.5 umol/l)

 controlled carbohydrate content diet (69 %) (for 91 days) and controlled fat content diet (12 %) (for 91 days) and controlled protein content diet (19 %) (for 91 days) then phenylephrine (2 umol/l) then sodium nitroprusside (0.316 umol/l)

 controlled carbohydrate content diet (53 %) (for 91 days) and controlled fat content diet (14 %) (for 91 days) and controlled protein content diet (33 %) (for 91 days) then phenylephrine (1 umol/l) then sodium nitroprusside (0-9.5 umol/l)

 vehicle control condition (for 28 days)

 controlled carbohydrate content diet (53 %) (for 63 days) and controlled fat content diet (14 %) (for 63 days) and controlled protein content diet (33 %) (for 63 days) then controlled carbohydrate content diet (69 %) (for 28 days) and controlled fat content diet (12 %) (for 28 days) and controlled protein content diet (19 %) (for 28 days) then phenylephrine (2 umol/l) then sodium nitroprusside (0.316 umol/l)

 controlled carbohydrate content diet (69 %) (for 91 days) and controlled fat content diet (12 %) (for 91 days) and controlled protein content diet (19 %) (for 91 days) then phenylephrine (1 umol/l) then sodium nitroprusside (0-9.5 umol/l)

 controlled carbohydrate content diet (53 %) (for 63 days) and controlled fat content diet (14 %) (for 63 days) and controlled protein content diet (33 %) (for 63 days) then controlled carbohydrate content diet (69 %) (for 28 days) and controlled fat content diet (12 %) (for 28 days) and controlled protein content diet (19 %) (for 28 days) then phenylephrine (1 umol/l) then sodium nitroprusside (0-9.5 umol/l)

 salidroside (40 mg/kg) (for 28 days)

 controlled carbohydrate content diet (69 %) (for 63 days) and controlled fat content diet (12 %) (for 63 days) and controlled protein content diet (19 %) (for 63 days) then controlled carbohydrate content diet (53 %) (for 28 days) and controlled fat content diet (14 %) (for 28 days) and controlled protein content diet (33 %) (for 28 days) then phenylephrine (2 umol/l) then sodium nitroprusside (0.316 umol/l)

 controlled carbohydrate content diet (53 %) (for 91 days) and controlled fat content diet (14 %) (for 91 days) and controlled protein content diet (33 %) (for 91 days) then phenylephrine (2 umol/l) then sodium nitroprusside (0.316 umol/l)