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Uploaded by SuperPTTS on Mar 11, 2011
How to use a dumbbell to increase the resistance of the crunchwww.pttrainingsystems.com
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No problem James - thanks for the comment!
SuperPTTS 6 months ago
I think it is harder if you put the weight behind the head, but it is it safe for the neck ?
1Rvk1 2 days ago
Cheers helped me alot!
JamesyLathan 6 months ago
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No problem James - thanks for the comment!
SuperPTTS 6 months ago