A thesis statement on doping in sports for a research paper

Hi!
I need help on polishing up my thesis statement. I am never good at writing and explaining my thoughts. Can someone help me make it sound better and give a perspective on the topic? This is my thesis statement below.

Doping in sports and other activities is a widespread problem that has affected people around the world. Their actions are affecting the future generations, teaching them to lie and cheat through life. These athletes who dope should be punished for their actions.

Hello, i will give you suggestion, i hope it will help you:

For introduction:
1. Explain about what is Doping
2. The phenomena

Body 1:
What is the negative effect of doping, give reason, example and result

Body 2:
Explanation about athletes who dope, the effect, example, and result

Conclusion:
Give your opinion or you main idea about the situation and you can give the suggestion maybe for the government, or parents which have responsibility to keep their generation.