Knees Up (Abdominal Exercise 5 of 8)
The abdominal exercises selected for the BEST exercise program are important for maintaining posture and stability of the lumbar spine. The BEST researchers recommend performing lower abdominal exercises rather than the classic sit-up or curl.

IMPORTANT INFORMATION: Please read before performing exercises.
Execution
Hold a pelvic tilt, then raise both feet off the ground so that the thighs are perpendicular to the floor, creating a 90-degree angle at the hip and knee joints.
Hold for 10 seconds. Repeat 6 times.
Next Exercise
Foot Lifts with Knees Up (Abdominal Exercise 6 of 8)
Reprinted, by permission, from T. Lohman, S. Going, L. Houtkooper, L. Metcalfe, T. Antoniotti-Guido, and V. Stanford. 2004. The BEST Program for Osteoporosis Prevention. Tucson, AZ: DSWFitness.
The BEST study participants supplemented their diets with Citracal® calcium citrate.