The improvement in sprinting performance through training can vary significantly from person to person. It depends on various factors, including an individual's starting fitness level, genetics, training methods, and dedication to the training program. It is difficult to provide an exact number of seconds by which someone can improve their 100-meter sprint time, as it can differ greatly.
However, with consistent and focused training, it is possible for individuals to achieve noticeable improvements in their sprinting times. Novice or untrained individuals may experience significant gains initially as they adapt to the demands of sprinting. As they continue to train, the rate of improvement may gradually decrease.
In elite-level sprinters, who have already reached a high level of performance, the margins for improvement become smaller. Achieving substantial improvements at that level often requires more sophisticated training techniques, meticulous attention to detail, and minor refinements in technique.
Ultimately, individual response to training is highly variable. Some factors, such as genetics and natural talent, play a significant role in determining an individual's ultimate sprinting potential.