Five minutes a day to improve lower abdominal muscle toneTargeting the lower abdominal area—a zone particularly prone to age-related changes after 30—can be achieved through five minutes of daily focused work on the deep core muscles. Photo: Pravda.Ru by Anna Malayeva is licensed under publiс domain Abs trainingTechnique for Lower Abdominal ActivationThis exercise requires only a standard fitness mat. Its main objective is to isolate the abdominal muscles while eliminating load on the lumbar spine. Bend your knees at a 90-degree angle so that the lower legs are parallel to the surface. It allows the user to engage abdominal muscles without the risk of back injury often associated with classic crunches.