Originally posted by aztecwolf
arms crossed in front, putting them behind your head puts stress on the neck, and you will end up using your arms to pull your head up instead of contracting the abs for the exercise
That???s when discipline comes in place; don???t put any pressure on your head when you have your hand behind them that???s all, concentrate on your midsection don???t pull with your arms. I prefer to put my hands behind my head, makes it so much harder and I personally feel it more than hands up in front. Next time you???re at the gym doing decline crunches do 15 reps with a 25 lbs plate on your chess. Then try the same with the 25lb plate this time with the plate behind your head, you???ll see what I???m talking about.