Best Ab Exercises: Dumbbell Jack Knife

http://www.fittplan.com Best Ab Exercises: The Dumbbell Jack Knife is one of the best abdominal exercises and targets the upper and lower abs. Abdominal exercise for women should include this move. Demo by Chris at Fittplan.com.

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[John Cruz]

this hurts like a bitch but works

[Sam Bache]

I wonder how long it takes to notice changes doing these

[XBOX36035]

its starts hurting after a while but the results are great :)

[Thin X Weight Loss]

Great video, thanks for posting!

[brotherofnaruto]

then that mean ur working them good

[shelton18081]

i love this exercise it hurts your abs after

[BarnaclesAhoy]

For added effectiveness:

Rotate your legs one direction, and your upper body another. Switch this vice-versa every crunch. The leg lift motion will target lower abs, the crunch middle abs, and the side to side motion will target obliques.

[12Jobs]

Hmm thanks this been added to my workout routine :) 👍

[BigJamez21]

Interesting

[eze4life100]

How much should be completed cuz i am trying to workout my whole body