I started about 3 weeks ago, doing the ACE kickstart program, which focuses on core in the beginning (see here: www.acefitness.org/acefit/fitness_programs
I'm wondering if I should maybe add back-specific exercises, like the "superman" or something...? I don't want to over-work it, but also don't want to hold myself back too much while I have good motivation to exercise - and cardio ability to do more. :)
Any thoughts from heavier folks / experienced exercisers...?