Best activity for Wendy for her heart heath and for the preparation for her first 5km is the mix of running and walking. A run-walk program is an effective training method that can help you increase your fitness faster. So, for someone yo had not been running this training method is the first thing to do. The run-walk method will allow Wendy to exercise for a longer period of time each session. This will increase her aerobic capabilities more rapidly, she will burn more calories, and reduce her risk of injury.