I have really been dropping the ball on exercise. I was planning on starting back up on Monday and wasn't feeling well at all. Then today I have pulled something in my neck and the pain is unbearable. I have 3 weeks until my first attempt. Is the exercise as important to have for a solid 6 weeks? Or will I be ok if I can try to get a solid 3 weeks in where I focus on strength and barely any cardio?