The physical architectural framework for vibrancy has seven major elements. The most important isn’t even physical.
More important than the other six (strength, endurance, core, flexibility, nutrition, rest) is motivation.
Having a purpose bigger than yourself.
Because when you do, years of effort are joyfully (mostly) spent while others quit or do the on-again-off-again yo-yo thing.
Week three of track training starts off with a bang.
The 800 and 400 interval times have dramatically come down.