Testing core strength

Testing core strength.
Think it's part of Pilates "Teasers".
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Trying to sit up as tall as possible whilst keeping the back as straight as possible too.
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It's hard
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Think it’s part of Pilates “Teasers”.
.
Trying to sit up as tall as possible whilst keeping the back as straight as possible too.
.
It’s hard
.
.
.
.
.