手撑墙壁：伸出手掌，与肩齐高，撑住墙。向后迈一步，利用腹部力量，下蹲，远离墙面，然后往回推。这是一种能在办公室做的俯卧撑。

Perfect posture: Tips for good posture include sitting with your bottom right at the back of the seat, and relaxing the shoulders so they don't elevate or become round

最佳姿势：最正确的姿势是紧靠椅子后背坐，肩膀放松，不要抬起或向前垂弯。