Mat,
Big four- kinda a ‘which art is best question’, IMO. ATG squats rock, but for me, right now I need to rehab my hips to save my knees before going heavy ATG, for instance.
If you’re concerned about your low back here are some things to think about-
1). You need strength and strength endurance in your abdominals and lower back both symmetrically and asymetrically.
2). You need to work on avoiding spinal flexion, keeping a strong L-spine curve (arch), and using your abs to stabilize your back. Check if you’re getting your hips under you in the WC stances by using some rectus or hip flexor, or if you’re using more glut- glut is right, shortening using the other stuff seems to do some bad things structurally (from a mechanical perspective) and may flex your L-spine, making you lose your arch, and predipose you to low back injury. Gluts extend the hip and move the pelvis forward, from what I can tell this is what Yip Man, Emin B, Steve Cottrell (on his kb videos) and Chuck Vogehpul (on the EFS exercise index demoing squats) are all doing.
3). For low back work for you I’d actually recommend k-bell (or DB) swings as you shouldn’t be taking any compressive load on your low back during their execution (and compression + flexion + rotation in the L-spine seems to = disc injury), but they will work your spinal erectors, hams, and gluts giving you both strength and muscular endurance.
4). For overall stabilization- farmer’s walks, figure 8 walks w/ a weight pressed overhead, suitcase deadlifts, windmills, bent press (done very carefully)
5). Westside guys swear by the rever hyper for rehabbing back injuries- L spine work without compression or rotation (actually with a little traction).
6). If you want a big exercise for strength- go with belt squats or trap bar deads until your back is right. The trap bar was invented by a powerlifter trying to train through a low back injury.
7). Stretch your hip flexors.
So-
Workout #1)
Trap bar DL
Upperbody press/pull horizontal plane, paired
Pick 1 from #4
Farmer’s walk or kb/db swings
Workout #2).
Unilateral leg work w/ dumbells (keep the load off the l-spine)- split squat, lunge, stepup, bulgarian squat
Upperbody press/pull vertical plane
Pick 1 from #4
Farmer’s walk or kb/db swings
Andrew