If you've resolved to get in better shape or improve your posture in 2015 , these discounted balance ball chairs can help you get it done without any real time commitment.

Amazon is offering the iconic Gaiam Balance Ball Chair in a variety of colors for $56, today only. That's one of the lowest prices ever listed, and well below the usual $80 asking price. If you're on the fence, check out the 4.2 star Amazon review average, and read some impressions from Lifehacker's Melanie Pinola for a more in-depth review.

If you want to class up your new furniture, you can pick up a velvet ball chair cover for $22 as well. These also come in a variety of colors, and sound like a great alternative to sitting on rubber, especially in the summer.

Remember that this is an Amazon Gold Box deal, so these prices are only available until midnight PT, or until sold out. [Amazon]

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