Welcome to All Things Plants, Nadine and Jim ! This is an excellent topic -- many of us are getting a bit up in years, shall we say, and have to modify our gardening activities a bit. One of the best things I ever bought was a "kneeler," like this one at Gardener's Supply:
http://www.gardeners.com/buy/g...
Getting up from kneeling on the ground is NOT my best activity anymore, I'm afraid!