Fixing posture

[Softmax09]

6‘1 and 70kg, I don’t really have any back or neck pain but if i try to sit upright I start to breathe heavier and it’s kind of exhausting, any solutions?

 

[Softmax09]

6‘1 and 70kg, I don’t really have any back or neck pain but if i try to sit upright I start to breathe heavier and it’s kind of exhausting, any solutions?

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