The supermodel, who recently celebrated her 59th birthday, said she doesn't exercise daily but keeps her routine consistent ...

For those interested in a stronger back, the row is ideal. Easy to learn, this exercise involves holding onto some form of resistance while pulling the arms from the front of the body toward the back.

Step 1: Lie on your back on the floor or an exercise mat. Step 2: Activate your core and butt muscles to flatten your back on the floor, tilting your pelvis slightly forward. Step 3: Hold the ...