Deadlifts will rip your core a new one. They also work your calves, hamstrings, arms, shoulders, back (particularly the erector spinea or lower back), chest, neck... pretty much every single muscle group is covered in one move.
Squats- work your entire lower body; glutes, hamstrings, quads, calves
Pull ups- work your entire upper body
Bench press- arms, shoulders, chest
Overhead press- arms, shoulders, upper back
One arm rows- arms, shoulders, upper back
If you lift heavy enough, you will feel all of these in your core as it works to stabilize your body. All muscles connect to one another and they all meet at the core. My core works harder to lift 3 sets and 8 reps of 150 lbs in a deadlift then it ever would doing hundreds of crunches
Take your focus off the Marshmallow. www.leangains.com/2010/01/marshmallo
"Toning" is marketing muscles to women who are afraid if they pick up a barbell, they'll leave the gym looking like She-Hulk. If you don't want to get bulky, lift heavy!
I can bench Nicole Richie, eat more than she does in a day before noon, I have a good 20 lbs on her but could still wear her pants.
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