This simple walking style comes from research in Japan. It is called interval walking. “Interval” means changing between fast and slow. Walk fast for three minutes. Then walk slowly for the same time. Repeat this pattern. The fast part should feel hard. You can still speak a few words. This style can make your legs stronger. It can also help your heart and fitness. (pubmed.ncbi.nlm.nih.gov)
For example, walk this way to a shop. Use a phone timer. Slow down when you feel tired. Start easy, and stop if you feel pain.