Enter information in the left column (first section); select appropriate menus. Click "Calculate". Evaluate hamstrings and lower back flexibility for adults.
After a brief warm-up the subject sits on the floor with shoes off. Subject places bottom of feet (10 to 12 inches apart) against the side of the box (approximately 12" or 30 cm high) with knees straight. Tester places measuring stick on box parallel to subjects legs; 15" or 38 cm at the edge of box closest to subject and end of measuring stick ("0") toward the subject. Subject places hand over hand and reaches as far as possible over measuring stick without bending knees. The best of three tries is recorded.
The quality of the stretch should also be examined for smoothness of the spinal curve and angle of the hip (near 90° or more). See Sit and Reach Spinal Flexion Assessment.
Golding LA, Myers CR, Sinning WE (eds): The Y's Way to Physical Fitness. Rosemont, IL: YMCA of the USA, 1982.