Courses We are currently offering 25% OFF!! That’s 25% OFF everything on the site up until and including September 30th in aid of students starting or going back to University. The added bonus is anyone can take advantage of this offer as we are feeling generous this month. Use the code adp25 on checkout to get your discount. The ADP Course in Acceleration and Deceleration: Biomechanics, Research and Training. An in depth insight into acceleration and deceleration biomechanics, research and training methods. Certificate in Growth & Maturation for Youth Athletes. Take your knowledge of Youth Athlete Development to a new level with our BASES endorsed course.