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Kinesiophobiaphobia
ki·ne·si·o·fobia
1. The extreme fear of exercise
This is one of the phobia series placed by Totes Krakra. If you have this phobia BEWARE of this location, but good news, practice makes perfect and practicing regular exercise will make you feel better and reduces anxiety associated with phobias. But double beware, exercise can become addicting. There is parking at the coordinates. Be especially careful of muggles in this busy area - stealth is required. This is a redux of another geocache called Think Thin - GC2VJNX -which is also the hint.
Wish I could say this was placed on National Fitness Day, but it wasn't.