Personal Fitness   Muscle conditioning and movement function can be enhanced with regular fitness training. Ideally this involves a combination of aerobic activity, functional or sports specific strengthening, and flexibility exercises.     A balance of different exercises and sports can help to prevent overuse or unequal muscle development, and will train the different energy systems in the body. However poor movement patterns and dynamic posture or alignment can increase muscle imbalances and the risk of injury.   Pilates based exercises are controlled and precise, with challenge from varying intensity or speed. Programmes target individual muscle weaknesses, with an overall emphasis on abdominal and core trunk muscles in isolation or with limbs. This assists in developing the co-ordination of different muscle groups in the body that either stabilise, or move joints.     Core stability can refer to the support and control given by muscles around joints and between joint segments to control the amount of movement. For example, the Transversus Abdominalis muscle, works as a deep stabilising muscle. It can contract as a protective response to strengthen and stabilise the spine in anticipation to load from movements.