Let's Get Fit Mystery Cache

The cache is not at the posted coordinates. The object you seek, however, can be found within approximately 1/2 mile of the posted coordinates.

This is a field puzzle. The posted coordinates provide a starting point for your puzzle solving adventure. The final cache coordinates are N40 12.xxx W074 40.xxx. To locate the cache, solve for the missing coordinates using the clues provided. 

This particular half-mile, paved portion of trail inside Hamilton's Veterans Park features an exercise fitness circuit. Exercise events occur at separate stations along the way. Whether you choose to perform the exercises specified as you solve the puzzle is entirely up to you, dear Cacher.

Personally, I like to begin my fitness routine with a double dose of hamstring stretches, followed with an achilles stretch plus a chin up. Then I round out my first set with the knee lift.

When I begin my second set, I'm always reminded of my favorite type of cache finds, which are those where I can sit and reach for them. I finish up with a good bench dip plus a leg stretch.

Note: during the winter of 2014-2015 one of the circuit course signs went missing. As the sign is required to solve the puzzle, I've posted a photo of the sign in the gallery.

Checksum for all missing digits = 31, or you can validate your answers on GeoChecker.com.

A trail map for Veterans Park can be found here: http://njtrails.org/wp-content/uploads/2012/10/VeteransPark_trailmap1.pdf

Congratulations to scottssports and pompom-girl for FTF (not to mention perseverance)!