Whey and casein supplementation significantly ( P < 0.05 ) decreased bSBP ( approximately 5mm Hg for both ) , aSBP ( approximately 7 mm Hg and approximately 6mm Hg , respectively ) , AIx@75 ( approximately 9.2 % and approximately 8.1 % , respectively ) and baPWV ( approximately 57 cm/s and approximately 53 cm/s , respectively ) compared with no changes in the control group .