That's a great question! Walking is a great form of exercise, and it's generally recommended that people aim to get at least 30 minutes of moderate-intensity physical activity most days of the week. However, there's no hard and fast rule about how much walking is too much. Some people may be able to walk for two hours a day without any problems, while others may start to experience negative effects after just an hour. It really depends on each individual's fitness level and health status. If you're thinking about starting a walking program, it's always a good idea to talk to your doctor first to make sure it's safe for you.