1. Can I just jump right in and start exercising?

It is not recommended to do so. It is crucial to consult the doctor before you stick to any physical activity. Especially cautious should be individuals who:
* are over 35
* lead an inactive way of life for a long period of time
* smoke
* have any health problems and diseases.

Try to follow these five phases of exercise in order to minimize injuries and improve your flexibility:
1. Warm-up: you can walk around or start exercising at a slow pace for nearly five minutes in order to increase your heart rate.

2. Stretch

3. Do your regular exercises

4. Cool-down (use a reverse method, your main aim here is to lower your heart rate).

5. Stretch again

2. What should I be cautious of while exercising and when should I immediately stop exercising?

You must immediately stop to do your exercises if you suddenly feel: 
* Unusual pain in the left or mid-chest area,  left neck, shoulder or arm during or right after your training session.

* Sudden lightheartedness, cold sweat, pallor or fainting.

There are also many other signs like headache, dizziness, nausea and muscular or joint pain which your body may give you. It is very important to listen to your body's signals and consult the doctor if something disturbs you.

3. Is it true that a person can exercise too much?

This happens very often. However you should remember that more is not necessary better. If you are just the beginner you should take a rest day between your workouts at least every other day. More advanced and active exercisers should take a rest day after a very intense training session or choose alternative workout programs which can help  work different muscle groups.

You should let your body recover from the stress which has been put by exercising.