Yard work is a common household task that could cause back pain due to all sitting/kneeling and lifting heavy things. Here are some tips to prevent back pain when doing yard work:

• Stretch before you start doing any work: Stretching helps to get rid of the tension in your muscles. Stretching is especially important if you’re going to be doing any heavy-lifting yard work. 
• Move around every once in a while: If you’re working on one task for a while in one position, try to move positions or take a break and walk around to keep your muscles from tensing up. 
• Use knee pads: If you’re doing garden work, you’re going to be sitting on your knees for a while. Try using some knee pads to support your knees.