  It corresponds to the limitation of the variation of the global mass

   INPUT
   - X: optimization variables (geometrical parameters of the stadium
   solids)
   - X0: initial solution
   - Human_model: osteo-articular model (see the Documentation for the
   structure) 
   - CalibOptiParameters: calibration parameters (coefficient of
   variation)
   - list_symmetry: list of symmetric solids
   OUTPUT
   - c: non-linear inequality constraints
   - ceq: non-linear equality constraints
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