1.punctuality
2.responsibility
3.self-reliance
4.confidence
5.presence of mind
The person you are sharing them with may be sick or have something and by sharing those they could pass it onto you
There are several factors that you have to keep in mind while you consider joining a gym or buying fitness equipment.
Some of the several factors are that if the gym is near your residence, or is it really a good gym with qualified trainers or is the equipment for your age and all.
Similarly if you have to decide a workout program you have to keep alot of stuff in your mind while planning for it such as:
Your goal that you have to achieve, your current weight, your overall weight, your diet and much more.