A proper mattress can do wonders for your lower back. This is because I constantly hurt my back at the gym, and it wasn't until I changed my mattress that I learned the importance of sleeping on a good bed (the core exercises also helped to strengthen my back to prevent further injury).

If you are in a similar situation but are put off by the high price that a good mattress demands, there is good news. Some of the best beds we reviewed are now at or near their lowest prices of the year. Memorial Day sales are a great time to upgrade to the best mattresses. Mattress sales are held any day of the week, but today's prices are some of the best we'll see through the end of summer.

So if you need a new bed, here are the top mattresses our editors have reviewed and recommend. (For more deals, be sure to check out our list of the best Memorial Day mattress sales that you can still shop.)