Warming up is important before physical activity or performance to prepare the body. There are two types of warm-ups - general warm-ups prepare the body for any physical activity, while specific warm-ups target a particular sport or activity. Warm-ups include stretching muscles to improve flexibility and elasticity, as well as elevating the heart rate to supply oxygen and remove carbon dioxide from tissues as needed.

1. WARMING UP
BY: David Palacios.

2. What is Warm-Up?
Warming-up is performed before a performance or practice.
Athletes, singers, actors and others warm up before stressing their
muscles. Is an exercise that you do before do physical exercise, it
prepares your body to physical activity.
 There are two types: SPECIFIC and GENERAL.
 The specific warm-up prepares your body for do a specific activity
or sport, instead of general, that prepares your body for all physical
activities.

3. Stretching
Stretching is a form of physical exercise in
which a specific muscle or tendon (or
muscle group) is deliberately flexed or
stretched in order to improve the muscle's
felt elasticity and achieve comfortable
muscle tone.

4. Heart rate
 The heart rate is the speed of the heartbeat
measured by the number of heartbeats per unit of
time. The heart rate can vary according to the
body's physical needs, including the need to
absorb oxygen and excrete carbon dioxide.