Nowadays, the standard basketball court dimensions are a rectangle 94 feet by 50 feet; however, high school basketball courts are a bit shorter, and the courts for junior high and youth leagues are even smaller.owadays, the standard basketball court dimensions are a rectangle 94 feet by 50 feet; however, high school basketball courts are a bit shorter, and the courts for junior high and youth leagues are even smaller.
Your heart's electrical system should maintain: 1  A steady heart rate of 60 to 100 beats per minute at rest. 2  The heart's electrical system also increases this rate to meet your body's needs during physical activity and lowers it during sleep.
The atria then begin to relax. Your heart's ventricles then contract (ventricular systole), pumping blood out of your heart. Each beat of your heart is set in motion by an electrical signal from within your heart muscle. In a normal, healthy heart, each beat begins with a signal from the SA node.