130 is extended and is at a right angle with the user 39 s upper arm 140 or as close thereto as possible at this point a measurement which is reflective of the length of the user 39 s lower arm 130 generally extending from just below the bicep to the middle of the user 39 s palm may be taken and read through window 155 although not shown hand grip 150 and particularly the ranging window 155 thereof may contain a needle or some other pointing device which points to the measurement scale on inner pipe 160 in order to obtain an accurate reading the measurement is typically taken in inches but may be taken in any other unit of measure so long as the associated arm length extenders 220 are sized according to the same unit of measure arm length extenders are shown in fig2 although only the two outside arm length extenders 220 are labeled as such in fig2 each of the tubes in the figure are arm length extenders 220 of varying lengths and are present in pairs on the carrying unit 200 shown in fig2 in a preferred embodiment of the present invention lower arm length ranges are used with each arm length range corresponding to a specific arm length extender 220 thus for example a push up device according to the present teachings may include five arm length ranges comprising extenders of 9 10 11 12 and 13 inches for each arm length covered a pair of arm length extenders 220 are present on carrying unit 200 in one embodiment of the present invention arm.