I am not a real flexible guy but I've been working on it. In fact, no one in my family is really flexible. It's so bad I almost instagram'd a picture of me touching my toes with straight legs as a family first. Anyways like i said I've been working on my flexibility and it has gotten a lot better. Additionally I've been making some great gains in my first cycle of HST and I am really enjoying it. My primary lift is the Deadlift and while I work out my flexibility seems great, all other times though, not so much. I looked up some low back and hamstring stretches and they work OK. I primarily do (using yoga names since it's the most common but I don't do nor am I interested in actual yoga); Cobra (laying on your belly with your arms in like a pushup while the rest of your body bends backwards) and the Standing Forward Bend (standing up straight and bending at the waist to touch your toes). These work fine for post work out or dynamically pre-workout/post warmup but I am still super tight with minor soreness in the entire posterior chain on recovery days and I'd like to be a little looser. While i can expect some DOMs it's just not a relaxed area in comparison to the rest of my body. Any suggestions?