@alejandromatias674: If you can do these four movements, you are building mobility and stability where it actually matters. And if the floor is too much, elevate everything. That is not cheating. That is smart training. Bird dog builds core stability and teaches your spine to resist unwanted movement. Low back pain is often linked to poor motor control, not just weak muscles. Elevation lowers the load while keeping the benefit. Thread the needle improves thoracic rotation, which protects your shoulders and keeps your low back from compensating. Limited upper back rotation is a common reason people feel stiff or achy. Plank to down dog dynamically loads the hamstrings and calves while training shoulder stability. Controlled dynamic stretching improves range of motion without sacrificing strength. Elevate if your posterior chain is tight. Forward fold to runner’s lunge opens the hamstrings and hip flexors and teaches smooth transitions between positions. Better hip mobility means less stress on the low back. Movement is for everyone. There is a modification for everything.