"Lie flat on the back. Raise first one leg and then the other to a perpendicular position." -Foster,…
"Raise and lower both legs. Continue until mildly tired. This is an excellent exercise for the abdominal…
"Lie flat on the back...hands clasped behind head. Pull up to sitting position." -Foster, 1921
"Stand erect, arms outstretched to the side horizontally. Twist to left as far as possible, then twist…