How to determine the role of genetic variability associated with individual responses to an identical training program.
We all respond differently to a training program. Not only is our physiological "starting point" highly individual, but our training response is also highly variable. Some people who essentially did not show ANY adaptation to a very well-controlled training program (measured for example as an increase in VO2 max), while others increased as much as 40% when doing the exact same training. Some athletes can do next to nothing 3 months then train like a madman, sweat, and spew chunks for three weeks and be in racing shape (ok, maybe too graphic). Others are 'hard gainers' that seem to lose everything if they miss 2 weeks of training. Some people tolerate and even thrive on, a high volume of training to reach peak fitness. Others cannot tolerate the same workload, but reach similar performance levels if they intersperse more rest days. We each have a unique psychological makeup. We have different strengths and 'weaknesses' within our physiological performance machine that should influence training plan design, and we have different hormonal and immune reactivity that will influence the level of stress we can tolerate and improve under. In the field of exercise physiology, we have learned a great deal about physiological adaptations and the general methods of training that conform to known physiology. This is very valuable information for the athlete to understand whether 24 or 64 (Of course I am biased on that score). But, remember, ANY exact training program that you copy from me or someone else is destined to be, at best an approximation of what will work best for you, and at worst, a total failure.
