1134
It doesn't get any better at 40
(slrpnk.net)
Comic Strips is a community for those who love comic stories.
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I do like 10 kettlebell swings, no plank (because I hate it) and my back has magically just become young again. It feels a little bit cool to swing that bad boy too.
I do sincerely recommend.
If you hate plank and don't have a kettlebell yet, start with some dead bugs.