the invention provides exemplary techniques for determining an appropriate sleep system . such sleep systems typically comprise a sleep surface , such as a mattress , and one or more pillows . the techniques of the invention are suited for determining appropriate combinations of sleep surfaces and pillows that assist in providing a neutral spinal alignment when the person is lying down on the sleep system . when the person &# 39 ; s spine is in a neutral alignment , the amount of comfort / support that the person experiences is maximized . the techniques may also be used to select a preferred mattress . the techniques of the invention may utilize a strength resistance test to determine if the person &# 39 ; s spine is in proper alignment . when such is the case , the person &# 39 ; s muscles may easily resist applied pressure . however , if the spine is out of the neutral position by even a small amount , a significant reduction in resistive force may be detected . the strength resistance tests of the invention are designed to correlate sleep surfaces with pillows , and in some cases simply to select an appropriate sleep surface . such sleep surfaces may include , for example , mattresses , including spring mattresses , solid mattresses , padded surfaces , firm surfaces , and the like . further , the pillows may be stuffed with a filling , inflatable , or the like . as the person &# 39 ; s spine is placed in a generally neutral position , the person &# 39 ; s muscles are permitted to relax , resulting in fewer pressure points and muscle soreness . presumably , this will lead to a better night &# 39 ; s rest and less partner disturbance . as such , the neutral position maximizes the amount of comfort / support experienced by the user . hence , such a test may be used to determine an appropriate sleep surface and pillow that is best suited for a person &# 39 ; s needs . to perform the sleep resistance test , the person is instructed to lie down with one arm extended generally perpendicular to the body . the person may lie on his back , side or stomach . another person gently pushes the person &# 39 ; s arm toward their feet with a firm , smooth motion . the most appropriate combination of sleep surface or sleep surface and pillow results when the person feels the strongest and most easily resists the applied force . other factors may also be used in determining the appropriate sleep surface and pillow , including how well the spine is aligned based on a visual inspection , how comfortable the user feels and the like . such additional factors may be used , for example , in cases where two tests produce similar resistances . to begin the process , in one embodiment , the person may first be instructed to select a preferred mattress . however , it will be appreciated that the person may alternatively wish to first select the desired pillow . the particular mattress may be selected based on the comfort level and support that best fits the person &# 39 ; s needs . this determination may be based on whether the person &# 39 ; s spine is in alignment when lying on the sleep system . also , a strength resistance test may be used to determine the preferred mattress . after the person has selected the mattress , they are then fitted with a pillow to insure the sleep system as a whole fits the person &# 39 ; s needs . in many cases , a person &# 39 ; s old pillow will be unsuitable for a new plusher mattress . hence , even if the person was previously satisfied with their pillow , when changing to a new mattress the old pillow may serve to place the spine out of alignment . hence , a number of pillows may be required to determine the appropriate sleep system . using a variety of pillows , the person &# 39 ; s arm is pushed toward her feet to determine the resistive force . the pillow that is associated with the greatest resistive force may be recommended based on the assumption that this pillow provides the most neutral position , i . e ., where the spine is in alignment , in combination with the chosen mattress . fig1 illustrates one example of a strength resistance test that may be used in selecting a mattress , or a baseline strength test for comparison with the results of other tests . initially , a person 10 is instructed to lie on a sleep surface 12 , such as a mattress . as shown , person 10 is lying on his back . however , other orientations may also be used , such as by lying on the person &# 39 ; s side or stomach . this particular test is performed without a pillow under the person &# 39 ; s head . the person 12 lies flat on the sleep surface 12 with his arm 16 generally perpendicular to the sleep surface 12 , with the palm positioned towards the person &# 39 ; s feet 20 . the tester 18 instructs the person 10 to try to maintain his arm 16 in the vertical position while the tester 18 pushes the person &# 39 ; s arm 16 toward his feet 20 . during the test , the tester 18 and / or the person 10 notes the amount of resistance provided by the person 10 . the amount of measured resistance may be used for a variety of purposes . for example , it may be used as a baseline measurement for subsequent tests as described hereinafter . alternatively it may be used when fitting a person for a particular sleep surface . for example , this same test may be repeated while lying on another sleep surface and the two measurements compared to determine which sleep surface is more suitable to the user . this decision may be based on the sleep surface that is associated with the greatest amount of measured resistance . although shown without a pillow , the base line test may also be made with a pillow underneath the person &# 39 ; s head . once a baseline resistance measurement is made by the tester , a pillow 22 ( or another pillow ) is placed underneath the person &# 39 ; s head 24 , and the test is repeated as shown in fig2 . the resistance generated by the person 10 is measured by the tester 18 and then compared with the baseline measurement . a decision as to which pillow to select may then be made based on the one that was used with the test measuring the greatest amount of resistance . this test may be repeated as many times as needed with different pillows and / or mattresses until the tester 18 and / or person 10 has decided which mattress / pillow combination produces the greatest amount of resistance during the test . other factors that may be used in selecting the mattress and / or pillow include how well the person &# 39 ; s spine is aligned based on a visual observation , the amount of comfort experienced by the person 10 , and the like . in addition to lying on the person &# 39 ; s back , other orientations may be used as well . for example , as shown in fig3 , person 10 may lie on his side with his arm 16 pointing upward and the palm generally facing the person &# 39 ; s feet 20 . alternatively , the person &# 39 ; s arm 16 may be positioned generally horizontal while being perpendicular to his body , with the person &# 39 ; s palm facing the feet 12 . the tester 18 performs the strength resistance test by pushing the arm 16 generally toward the feet 20 while noting the amount of resistance provided by the person 10 in a manner similar to that previously described . such a test may be particularly useful for people who tend to generally sleep on their side . fig4 illustrates the strength resistance test when the person 10 is lying on his stomach . the person &# 39 ; s arm 16 is positioned downward toward the floor , with the palm facing the feet 20 . tester 18 presses the person &# 39 ; s arm 16 toward the feet while the person 10 resists the force . this test may then be performed on other sleep surfaces and / or pillows to select the appropriate sleep surface and / or pillow in a manner to that previously described . such a test is particularly useful for individuals who primarily sleep on their stomachs . referring now to fig5 , one method for selecting preferred sleep surfaces and pillows will be described . initially , the user selects a sleep surface , such as a mattress as illustrated in step 100 . optionally , the user may lay on the mattress without a pillow as shown in step 102 . this may be the case , for example , when the user is attempting to select an appropriate mattress . as another example , the user may lay on the mattress without the pillow to perform a baseline strength resistance test that is to be compared with other tests where a pillow is used . a strength resistance test is then performed on the user as shown in step 104 , and the amount of resistance produced by the user when lying down is measured as shown in step 106 . the user may then select another mattress as shown in step 108 . steps 102 , 104 and 106 are then repeated for the second mattress . this process may be repeated for as many mattresses as the user wishes to test . at step 110 , the resistances produced during each of the tests are compared , and the mattress that is associated with the greatest resistance may be chosen as shown in step 112 . in some cases , the above process make be performed in an iterative process . for example , the first two mattresses may be tested and the most preferred one selected . the test may then be repeated using mattresses selected from the first test with another mattress . with a mattress selected , the user may proceed to associate a preferred pillow with the mattress . as shown in step 114 , the user selects a pillow for the first test . the user lies on the mattress and the pillow ( see step 116 ) in a familiar sleeping position , such as on the back , front or side . a strength test is then performed as shown in step 118 , and the resistance produced by the user when lying down is measured in step 120 . the user decides whether to selects another pillow in step 122 and , if so , steps 114 , 116 , 118 and 120 are repeated . with a desired number of tests have been performed , the resistances are compared in step 124 and the pillow that is associated with the greatest resistance is selected in step 126 . as when selecting a mattress , the process of selecting the pillow can be an iterative process . the invention has now been described in detail for purposes of clarity and understanding . however , it will be appreciated that certain changes and modifications may be practiced within the scope of the appended claims .
a method for selecting a sleep system comprises positioning a person on a mattress in a lying position . one of the person &# 39 ; s arms extends generally perpendicular to the person &# 39 ; s torso . a first pillow is positioned underneath the person &# 39 ; s head , and a force is applied to the person &# 39 ; s arm in a direction generally toward the person &# 39 ; s feet . an amount of resistive force supplied by the person &# 39 ; s arm is estimated and used to determine whether the proper combination of mattress and pillow is achieved .