FIGURE 2. ILLUSTRATIONS A-C SHOW DIFFERENCES IN THE ELBOW FLEXION ANGLE (Q) FROM ADJUSTING THE HEIGHT OF THE AXLE. ILLUSTRATION B DEPICTS THE RECOMMENDED ELBOW ANGLE (Q2 =100 TO 120 DEGREES). ANGLE Q1 IS SMALLER BECAUSE THE SEAT IS TOO LOW (AXLE TOO HIGH). ANGLE Q3 IS LARGER BECAUSE THE SEAT IS TOO HIGH (AXLE TOO LOW).