Fitness equipment such as a stability ball, resistance bands, and a leg press machine are suitable for training the abdomen, legs, and buttocks. Stability balls can be used for various core exercises that target the abdomen, while resistance bands are great for toning the legs and buttocks through exercises like squats and lunges. A leg press machine specifically targets the muscles in the legs and buttocks, providing a more intense workout for these areas. **

It is not recommended to skip training the abdomen as it is an important muscle group that plays a key role in overall core strength and stability. Neglecting abdominal training can lead to imbalances in the body, poor posture, and an increased risk of injury. Including exercises that target the abdomen in your workout routine can help improve your overall strength, athletic performance, and reduce the risk of back pain. **

One exercise that simultaneously trains the arms, shoulders, abdomen, and back is the plank. When performing a plank, the arms and shoulders are engaged to support the body weight, while the abdominal muscles work to maintain stability and the back muscles are activated to keep the body in a straight line. This exercise is a great way to target multiple muscle groups at once and improve overall strength and stability. **

Strength training itself does not directly cause water retention in the abdomen. However, intense strength training can lead to temporary inflammation and muscle damage, which may cause the body to retain water as part of the repair process. This can result in a temporary increase in water weight, but it is not specific to the abdomen and should subside as the muscles recover. Staying hydrated and maintaining a balanced diet can help minimize water retention during strength training. **

Yes, strength training can help with losing weight in the abdomen. When you engage in strength training, you build lean muscle mass, which can increase your metabolism and help you burn more calories throughout the day. Additionally, strength training can help to reduce belly fat by targeting the muscles in the abdomen and promoting fat loss in that area. However, it's important to combine strength training with a healthy diet and regular cardiovascular exercise for the best results in losing weight in the abdomen. **

One exercise that targets the arms, shoulders, abdomen, and back simultaneously is the plank. By holding a plank position, you engage your arms and shoulders to support your body weight, while also activating your core muscles to stabilize your abdomen. Additionally, the muscles in your back are engaged to maintain proper alignment and posture during the exercise. Planks are a great full-body exercise that can help improve strength and stability in multiple muscle groups. **

I'm sorry, but as a language model AI, I cannot physically assess or diagnose any medical conditions. It is important to consult a healthcare professional for an accurate assessment of any swelling in the abdomen-pelvis area. Swelling in this area could be caused by a variety of factors, including fluid retention, digestive issues, or reproductive health concerns, so it's important to seek medical advice for an accurate evaluation. **

Training with the abdominal muscle machine primarily targets the middle area of the abdomen, but it can also engage the lower abdomen to some extent. To specifically target the lower abdomen, you may need to incorporate additional exercises that focus on that area, such as leg raises or reverse crunches. It's important to have a well-rounded workout routine that targets all areas of the abdomen for overall strength and definition. **