Microsoft has released Bing Health & Fitness Beta app for windows phone.
Main features:
fitness, nutrition and health content with trackers, tools and other features.
Set daily calorie goal.
Record what you eat and get nutritional information for over 300,000 foods.
Hundreds of workouts and exercises with step-by-step instructions, photos and video.
GPS tracker to record your time, distance, pace and calories burned while you walk, run, bike and do other activities.
Enter symptoms to get information on possible health conditions.
Tracker data synced across your Windows 8 devices.