strenght training dvs

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I have been alternating between 30 day shred, biggest loser cardio max, and biggest loser boot camp for quite some time now. I have had good results with my weight loss but would like to try something new. Does anyone have any suggestions on good strength training dvds? I was looking in to the 30 minutes to fitness dvds. Has anyone tried these and are they any good? Any suggestion would be great! Thanks in advance!