That depends on the nature of your exercise. Heart beat rises to meet your metabolic requirements. Normally the heart rate goes up to 100 to 160 per minute. It may go up to 180 beats per minute in severe exercise.
because you been doing alot
Any exertion or exercise with make your heart rate rise. So, yes, swimming will make your heart beat fast, depending on how much energy you put into the swimming.
It's not good at all.
The rate of the heart beat is regulated by the SA node (SinoAtrial Node/aka the Pacemaker). It determines how fast the heart pumps by sending electrical signals faster or slower to the rest of the heart.
I don't think you can unless you have an existing heart condition. When you exercise your heart beats, but it is good for you; as it pumps the blood around your body. If your heart didn't beat fast when you exercised you wouldn't be getting any fitter than you previously were and if trying to, you wouldn't lose any weight.
Because when you exercise, your heart works harder to get blood to the muscles and when your're done, there is no need for the heart to beat fast.
The nervous system causes the heart to beat faster when you exercise. It itself is not an organ but a system.
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exercise, drugs, excitement, health problems,
your heart is not beating fast enough
The heart beats as fast as 200times per sec during excercise.
The heart beat can increase due to stress and exercise. There are many other factors that can increase heart rate.