Aerobic bracelet / Aerobic bracelet

Design Concept /
When running will want to know how long it is aerobic exercise, this design sports bracelet show the color, with calorie consumption, color will change, different exercise condition have different colors.
ex. 130 heartbeat for 15 minutes, that there is a stage line, will change color when reached.
Design Feature /
1.User can know how long it is aerobic exercise.
2.It let user can Stick to run.
3.When excessive exercise, it will turn yellow