X-Factor: ST By Weilder - Glutes & Thighs.

Get the body you want in 8 weeks. Weider X-Factor: ST - Complete 12 DVDs Workout Program this workout features a 90 Sequence Training. Maximize your workout with 90-Second Sequence Training! Perform intense 90-Second exercise followed by a strength training movement or rest period and another 90-Second Sequence. It's the best way to burn calories and build muscle in the same workout!