There are many scientific articles that prove how many benefits the human body reaps from physical activity and playing sports. Exercise strengthens the brain, improves memory and the ability to think. It prolongs life, improves skin health, strengthens muscles and bones, improves sleep quality, speeds up metabolism and strengthens team spirit.
When writing code – give your best, put yourself “in the shoes” of the many developers who will have to maintain it for many years to come and do try to make them happy. Always try to learn the concepts and understand the source code, don't ever copy-paste it, if needed – reuse it.