Stretching the Psoas and hip flexors. We take post workout stretching pretty seriously around this joint. It's the only way we can walk out of here and keep coming back. One of the beasts that haunts us and wreaks havoc on our lower back is the hip flexor group, including the Iliapsoas (the other nasty muscle is the hamstring as it pulls on the pelvis from the other side if it's tight). Our in-house PT phenom Nicole got us this band stretch, a variation of a partner stretch used to get into the hip flexors. The band is placed around the ankle, the hips/pelvis are laid flat against the floor, the band is pulled over the shoulders to end range and the stretch is held. Where is "end range"? That's the point where if you were to pull anymore one side of the pelvis would lose contact with the floor. For those with decent flexibility, the knee will come up and the pelvis will still be in contact - that's good as it will get into those deep, nagging hip flexors. For those without, the knee won't come up and if it does, the pelvis will most likely crank up on one side. That's no bueno. The stretch will be felt across the quads and into the hips dependent upon your felxibility.  Hold that sucker for at least a minute, lather, rinse, repeat. Start now and your lower back and hips will thank you!