Check Your Body Oxygen Level

 This is 25 Seconds  Breathing Holding Formula. If you can hold your breath for 25 seconds. Then your body oxygen level may be good because your lungs are strong. 

1. For this, use your mobile timer and set the timer 25 seconds. 

2. Hold your breath and start the timer. If you will complete it, you will succeed. You will three chances to do it. 


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