Sit ups, are one of the basic exercises, but still a lot of times are performed incorrectly. Solution? – AB Mat!When we place an AB Mat under the lumbar spine, we create excellent conditions for the movement of the abdominal muscles. Ab Mat supports the natural curvature of the spine, the pelvis is in correct position, the spine curves, and consequently the stomach muscles are stretched, while the sit ups become more effective despite lower strain.We strongly recommend, to use the Ab Mat, to anyone who wants to start using GHD in the future of course, strong abdominal muscles are a prerequisite for safe exercise with an Olympic barbell and … well, to be honest, strong abdominal muscles are a prerequisite for performing simply all exercises in the gym.In addition, the long Ab Mat provides additional support for the tailbone, which is especially important when the training consists of numerous sit-up repetitions.