Muscle Warm-Up
Muscles work best when the body's temperature is anywhere from 38°-39°. The body's normal temperature is 37°. To increase it do warm-up exercises prior to working out. Good ones include stretching, jumping, and jogging slowly. A warm up will improve the effectiveness of training and should be done before every training session. This is fundamental to a safe practice.
A warm up releases adrenalin, which will increase the heart rate and dilate capillaries, which will enable the oxygen in the blood to travel with greater speed and volume to the muscles. The increase in temperature of the muscles causes a decreased velocity within the muscle, which is an advantage as it enables greater extensibility and elasticity of muscle fibres, which leads to an increased force and speed of contraction. Warm ups also make performers more alert thanks to an increase in the speed of nerve impulse conduction.
