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Do you want to build muscle and develop mental strength? Then you must do this workout.
I used a 10kg dumbbell to target all muscle groups. You'll literally feel your mind become stronger as you do the exercises.
Note that isometric exercises don't involve any movement. You simply hold one position for a certain duration.
Lastly, isometric workouts are not ideal for people with high blood pressure.
Enjoy the isometric dumbbell workout for muscle and mental resilience.