In the gym, there are many kinds of exercise equipment to work the core muscles. The core muscle group refers to a group of muscles in the torso of the human body, including the rectus abdominis, the external oblique abdominis, the internal oblique abdominis, the psoas, and the sacroiliac muscle. Their role is to support and stabilize the body, maintain balance and postural control.

Here are some common exercise equipment that can effectively work your core:

1. Supine board: A supine or inclined board is a device that immobilizes the body and engages the core muscles. You can do sit-ups, planks and side plank supports and other movements to effectively exercise the abdominal muscles and lumbar abdominal muscles.

2. Abdominal wheel: Abdominal wheel, also known as roller, is a kind of equipment that can exercise abdominal muscles and core muscles. By holding the abdominal wheel with both hands, pushing the body forward, and then returning to the initial position, you can effectively train the core muscles.

3. Treadmill: Treadmill is a common aerobic fitness equipment, in addition to enhancing the heart and lung function, you can also exercise the core muscle group. When running, the body needs to maintain stability and balance, which requires the support and control of the core muscles.

4. Dumbbells: dumbbells are a very common fitness equipment that can carry out a large number of practice items. Through various dumbbell exercises, such as leaning one-arm row, balanced one-arm push and other movements, you can effectively exercise the stability and strength of the core muscle group.

5. Handstand machine or handstand: Handstand machine or handstand is a kind of equipment that can be handstood, through handstand exercise can adjust the body's center of gravity, but also exercise the core muscle group, especially the abdominal muscles.

6. Barbells: Barbells are a great tool for working your core. By performing squat, hard pull, bench press and other movements, you can strengthen the stability and strength of the core muscles.

7. Small ball (stability ball) : Small ball is a kind of equipment that can increase the difficulty of movement, through some balance and stability training on the small ball, you can effectively exercise the core muscle group.

8. Suspension equipment: Suspension equipment such as suspension belt, suspension ring, etc., can carry out many complex actions, including handstand, arms support, upside down leg flexion and extension, etc., these actions are very effective in exercising the core muscle group.

9. Pulley: Pulley is a kind of instrument that can adjust the balance of its body, and can carry out a series of exercises through the control of tension and balance to exercise the core muscle group.

10. Balance board: Balance board can help improve balance and can be used as an auxiliary tool to exercise core muscles. By standing on the balance board to perform leg flexion and extension, single-leg balance and other movements, you can effectively activate the core muscles.

          To sum up, there are many kinds of fitness equipment in the gym can exercise the core muscle group, each equipment has its own characteristics and advantages, you can choose the right equipment for exercise according to your personal fitness goals and preferences. The combination of different equipment can comprehensively exercise the core muscle group, and gradually improve the stability and strength of the core muscle.