Final answer:
The most effective practice to increase the chances of a personal fitness program's success is choosing fitness activities that have personal interest.
Step-by-step explanation:
The most likely practice to increase the chances of a personal fitness program being successful is choosing fitness activities that have personal interest.
When individuals engage in activities they enjoy, they are more likely to stick with their fitness routine and make it a long-term habit. This increases the chances of achieving their fitness goals.
Breaking fitness goals into smaller steps and implementing a reward program can also be effective strategies, but the key factor is personal interest in the chosen activities.
Learn more about personal fitness programs