Competitive athletes ask more of their bodies than the average athlete. If you are struggling to improve your speed, distance or time there are a few factors to consider.
Research has shown that poor quality sleep reduces muscle growth after training so make sure you are getting a good nights sleep. Stress can affect sleep quality so consider whether this is affecting you. Stress can also increase risk of injury. If you feel you are not coping with a stressful situation and are using exercise to manage your stress then consider NLP or hypnotherapy.
Diet and nutrition are vital for muscle growth and repair, especially in endurance athletes. The correct balance of protein and carbohydrate will increase stamina and recovery.