Tight groin and hip muscles can contribute toward back pain, which is why it is important to target the muscles surrounding your back, like the glutes, hips and hamstrings, rather than just stretching your lumbar spine.
There's an exercise tucked neatly away among the yoga community, and it is the gold standard of hip exercises for melting away tension and releasing tight muscles. It's called frog pose, and I am completely, utterly obsessed with it.
