You can choose some simple conventional motion to fitness, such as every day do a few minutes of push-ups, jump rope skipping, etc.

你可以选择一些简单的常规运动来健身，比如每天做几分钟的俯卧撑、跳跳绳等。

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Most of the current wearable devices confine themselves to health and fitness uses and contain basic technology, such as a motion-sensing pedometer that may offer less than precise readings.

CNN: The wave of wearable computers

Wearable 3D body motion tracking is enabling the next wave of innovation in cloud-connected wearable sports, fitness, healthcare and gaming sensor accessories for smartphones.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)