To safely increase physical activity levels, it's essential to start gradually and listen to your body. Begin with low-impact activities, such as walking or cycling, and incrementally increase the duration and intensity. Setting realistic goals and incorporating variety can help maintain motivation while reducing the risk of injury. It's also beneficial to consult with a healthcare provider before starting any new exercise program, especially if there are pre-existing health concerns. Staying hydrated and ensuring proper nutrition can support physical activity advancement.