Piriformis
The balance and stretching exercises are designed to maintain and/or improve balance, improve posture, prevent forward head or hunched-over posture, correct for muscle imbalances, and stretch muscles worked during the strength training segment of the BEST workout.

IMPORTANT INFORMATION: Please read before performing exercises.
Execution
In a supine-lying position, lift one knee up and across your chest.
Hold with the same hand, same knee, opposite hand on your ankle.
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.