Bend your knees and pull your upper thighs into your
midsection. Holding a ball between your knees
increases abdominal pressure.
In this particular
case, the person is using a weighted medicine ball to
add resistance.
Bend your knees and pull your upper thighs into your
midsection. Holding a ball between your knees
increases abdominal pressure.
In this particular
case, the person is using a weighted medicine ball to
add resistance.