To stay healthy, it's important to maintain good sleep patterns, exercise regularly, and eat well.
Getting plenty of rest, exercising on a regular basis, and eating healthy foods are three of the most important factors in keeping yourself healthy as you age.
この場合、次のような言い方が自然な感じで良いと思います。
ーTo stay healthy, it's important to maintain good sleep patterns, exercise regularly, and eat well.
「健康維持をするのに、良い睡眠パターンを持続すること、定期的な運動をすること、そして正しい食事をとることが重要です」
ーGetting plenty of rest, exercising on a regular basis, and eating healthy foods are three of the most important factors in keeping yourself healthy as you age.
「十分に休養をとり、定期的に運動をし、健康に良い食べ物を食べることは、加齢に伴う健康維持の最も重要な3つの事柄です」
ご参考まで！
カナダ 
