You do not just visualise that your are scoring a goal, or you are hitting the golf ball in the perfect spot, you FEEL it.
During the session you will be able to feel those moments of achieving your goal like if it was happening right now, therefore you will believe them. That is how powerful the subconscious mind works. You will not have doubts about your full potential and your capacity to exceed your goals.
Every client has different needs but normally they come to seek help with hypnosis when they have fear of failure, mixed messages of thoughts, doubting thoughts at the wrong time, loss of focus, emotional anxiety before vital events, it varies.
It is well known that Tiger Woods and Jack Nicklaus, amongst other successful athletes, have found the use of hypnosis very beneficial for their careers.