This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to use exercise to help you lose weight
Select an exercise regimen that is appropriate for you.
Choose activities that you like, exercise at convenient times of the day, and have a variety of exercises to chose from to avoid getting bored.
Familiarize yourself with the benefits and potential risks of the exercises you are considering.

Pick from: 1). Be sure to be aware of the signs that you should choose a new activity over the current one. Watch what exercise programs are being offered and select a program that will promote your particular health goal. 2). The benefits and risks of exercise are several and will be discussed in the next section. Health professionals recommend that you choose a low impact activity that does not get stress on your muscles. 3). You will want to know approximately how many, what muscle groups are being used, and how long you should perform the exercises. Spend most of your time on regular aerobic exercises. 4). There are just a few exercises to consider when deciding on a new activity. They include : Cardio exercises which utilize lower intensity movements like sit-ups, push-ups, and leg raises lifting lighter weight training Choose a physical activity that helps you gain muscle.
The answer is:
3).