Elite athletes like Noah Lyles and LeBron James succeed not because they have perfect training plans, but because they execute them consistently. Pick a realistic plan you can do every day, stick with it through the summer, and you'll see progress.
Chapters
The best plans in the world will get you nowhere if you're not doing them consistently. You could have Noah Lyles' speed program, you could have LeBron James draft up his offseason basketball program, but if you're not using them consistently, you won't make gains no matter how good the plan is. Your lack of progress is probably not because you don't have a perfect plan, it's because you are not staying consistent to the plan you currently have. So whatever your goal is, find a good plan that you can implement and that you can do day after day after day, and you commit to it and you lock in for the entire summer. I I promise progress will be seen.