You enjoy walking and are an excellent cardio athlete. You might incorporate weight training while taking a day or two of "active rest" each week. This could include light stretching exercises like yoga.
Congratulations if this exercise regimen even remotely resembles your own. There is now another clever technique to improve your long-term well-being through movement. Everyone should practice being mobile. Your body will get used to moving and find that other exercises are more accessible.
90-90 Stretch

Although the 90-90 stretch is often performed seated on the floor, you can alter it by boosting your sitting position with a chair or yoga block.
The lower back and hips are the focus of this stretch. By reducing muscle tension and extending your range of motion at the knee, the 90-90 stretch can assist manage discomfort or lessen your risk of injury. The 90-90 is also beginner friendly which helps a lot for newbies.
Ankle Stretch

The ankle stretch exercise focuses on the ankle to ease tension felt at the knee. Begin by standing with one toe on a wall next to you, so you stand one foot away from the wall. Then align the toe of your rear foot with the heel of your front foot until you feel a stretch in your calf. Extend your knee past your toes while maintaining the heel on the ground.
For two minutes, stretch passively for 60 seconds before occasionally contracting and relaxing for 60 seconds. You may make the stretch more strenuous by sometimes pressing the foot into the ground like you are pushing the gas pedal in a car.
The Cat-Cow

To reduce lower back discomfort, the cat-cow exercise focuses on the spine. It's a beautiful technique for strengthening the core as well. Start on all fours with your toes tucked under. Put your hips over your knees and your shoulders over your wrists. Put your hips over your knees and your shoulders over your wrists.
You may flex your spine by planting your feet firmly on the ground and elevating your belly button. P using the belly button to the ground in the opposite direction will slowly lengthen the spine, creating a curving dip in the lower back. Attempt to widen the chest. For a total of two minutes, perform ten repetitions of the exercise.