Best Cathe workout for strength training/muscle definition?

workout

Cathlete
Hello, I believe the answer to this is somewhere in these forums (yes, I'm lazy to look it up :)) Which of the following programs is best to strengthen muscle and increase muscle definition, this is what I'm thinking:

STS (90 day program)
X-Train (90 day program)
Low Impact Series
Gym Style DVDs
Slow & Heavy Series

I want to start another program and wanted something that can increase muscle definition; I've been doing another program (different trainer) but I'm hurting in spots I never hurt before like lower back, knees, elbows because of some weird moves, so I don't want to take a chance and hurt myself and this is with me modifying some of those moves. Thank you all for your help, I truly appreciate it.
 

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