How many motion axes does your own knee have?
Now that you understand motion axes, use your own knees (if you are able) to guess how many motion axes your knee has. To test out various motions, try moving your knees by standing with two feet on the ground and by sitting on a chair with your foot suspended (not touching the ground). Be aware that motion along some axes may be much smaller or subtle than motion along other axes. Once you have a guess, write that number on page 1 of your worksheet.