These numbers are very low, for at least my region. Paver patios run about $20.00+ per square foot, higher for upper end pavers. That's patio install only, not including lawn repair, pergolas, columns, seat walls, lights, walls, steps etc... So figuring a flat yard and being able access with machinery. If by hand price goes up.
Aerobic exercise (also known as cardio) is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process.
Walking is great exercise and can be very beneficial aerobically. Aerobic exercise is defined as brisk physical activity that requires the heart and lungs to work harder to meet the body's increased oxygen demand. In other words, it's moving your body to get your heart and lungs to work a little harder.