Are you hitting all of your major upper body muscles by doing...

[lavi]

Do you understand what happens when you strengthen your abs while neglecting the lower back?

Hey, I'm curious too...

 

[WalkingBeast]

You don't need to work the lower back if you're planning on using only bodyweight exercises like we've listed.

Why not strengthen the lower back?

 

[Debaser]

Hey, I'm curious too...

You'll make yourself more prone to injury. It's the same reasoning behind doing rows to keep your strength balanced in the horizonal pushing plane. Otherwise your shoulders will be pulled forward. I'd have to dig up the specific musculature, but I do know that the abs and lower back have the same relationship.

 

[Lord_Suston]

most americans have a forward slumping posture, hence many have back pain due to the constant stress place on the lower back that usually get no direct stimulus, doing ab excerices will help the abs but will put tension on the ribs and make them flex forward if the are disprportionately strong in comparison the the erector spinae. this will move the lumbar vertabrae forward cause you body to lose the natural curve we should have

Weighted Dip, Pullups, Rows, OHP, reverse hypers and crunches shoulde pretty much ge all the major muscle, of hyeah add shrugs in there

 

[supersizeme]

traps do not get worked doing pullups, pushups and situps