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re:Dereks Intermediate Workout
Hi guys, just started the routine this week, will check back to update ur'l on progress. Question for Derek(hopefully he reads this forum)...I've read on all the sites that I've been to that ur workout should not be lonfer than 47.5 mins. Anythin longer can have a negative effect on growth hormones. How long should this workout last?
Thanks in advance
Zak
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