Her hair was kept brushed back into a ponytail as she prepared to start her morning exercise regime.
Behind her were two grey lilos which could be used to relax on after a strenuous swim.
She typed: “Morning dip.”
In the comment section, fans gushed over the star as they praised her youthful looks.
Amanda has said she gets put on the “naughty step” for revealing details of their personal life.
She admitted in 2016: “Much to my poor husband’s dismay, I confess everything to some newspaper or other every week by accident or on Twitter, because I am chatty.
“I have no more secrets because of social media and life in general.”
This article originally appeared on Daily Express :: Celebrity News Feed