Sarena Sloan able to submit shackled from the wrists and ankles. Putting her abdominal flexibility to the maximum test. The wear time gradually increases reducing the “break in time” to a few minutes as the jabs get quicker and harder. Sarena's hardcore abdominal muscle break-down period can take much longer to break-down and soften up because of her awesome flexing. Targeting and activating those muscles even targeting the low belly muscles to achieve rock-hard abs tests of muscle strength and endurance the testing of maximal muscular power. Her abs flex instantly to overcome the blows and... Show more