One way to estimate the effectiveness of any abdominal exercise is in measuring the momentaneous activity by (EMG), with the activity generally being compared to that of the . However, an exercise of lower activity performed during a longer time can give at least as much exercise as a high-activity exercise, with the main difference being that a prolonged duration results more in than .
It has been highly disputed whether or not abdominal exercises have any reducing effect on abdominal fat. The aforementioned 2011 study found that abdominal exercise does not reduce abdominal fat; to achieve that, a deficit in energy expenditure and caloric intake must be created—abdominal exercises alone are not enough to reduce abdominal fat and the girth of the abdomen. Early results from a 2006 study found that walking exercise (not abdominal exercise specifically) reduced the size of subcutaneous abdominal fat cells; cell size predicts type 2 according to a lead author. Moderate exercise reduced cell size by about 18% in 45 obese women over a 20-week period; diet alone did not appear to affect cell size.
Abdominal exercises can also be performed with the help of some machines and the is one of the most popular machines used in and . Other machines are the Ab Roller, the Ab Rocket Twister, the Chin-up bar in conjunction with Ab Straps and the Torso Track. The is also a tool that helps strengthen the abs. It may be more effective than the crunches on the because the abs do more work as the legs are not involved in the exercise. With respect to the Ab-Slide, the study performed by Bird et al. showed greater muscle activation in the upper rectus abdominis, lower rectus abdominis, and external oblique when compared to the standard abdominal crunch. The Ab-Slide has proven to be an effective tool in strengthening the abdominal muscles from a concentric muscle action perspective. However, this research does not support replacing the traditional crunch exercise with the Ab-Slide gadget due to the lack of proven effectiveness in the eccentric loading of the abdominal muscles and the greater postural control. Potentially the most effective equipment for abdominal strengthening are those that offer the least stability. Examples include the CoreFitnessRoller, bodyweight suspension training such as TRX and stability balls with or without the Halo.
Abdominal exercises are useful for building the . This is useful for improving performance with certain sports, back pain, and for withstanding abdominal impacts (e.g., taking punches). According to a 2011 study, abdominal muscle exercises are known to increase the strength and endurance of the abdominal muscles.
Red Abdominal Exerciser