got mine about a year ago from
http://www.fitness-superstore.co.uk/...9-2C98FDCDC351
Hanging upside down on the chinning bar has a certain appeal about it... and i always fancied doing crunches like this since i seen Sly doing em in Rocky 3.....
A word of caution if you do a set of inversion crunches to failure its vevy difficult to get enough momentum to grab back hold of the chinning bar to bet off.. Its best to tie a rope around the middle of the bar so you can pull yourself up at the end of the set..... or you’ll end up dangling upside down for some time….
I love these boots… Inverted crunches are a killer…. Don’t be surprised if you can only do 3-5 to start… but I have worked up to sets of 15 over the last year….
Its good fun getting birds to have a go at parties to :-)