I lost some weight with core traing system.?!

ok i weighed 186 in november, and i weighed 176 in feb, and today, i weighed 168, is this weight loss ok, ive been doing the core systems traing , it has a 45 minute tape, and a 20 minute tape, that i use back to back, also i use my ablounge, 2-3 times a week, is this a good excersize regimen!?Www@Answer-Health@Com

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