Proberos® Breathing Trainer, Portable Muscle Trainer

Actually makes you work for each breath. Good build quality.

Nice product.good fit Quality is super Nice breathing while brisk walk

Very Nice product, you can see the difference on your first use itself

It clearly says that there are separate adjustment knobs for the in breath and out breath but in fact there is only one adjustment knob, so it is necessary to turn the control knob every inn breath and out breath if you want different resistances for inhalation and exhalation. Be warned! Quote: "Equipped with two distinct resistance knobs, this respiratory trainer allows users to finely tune the difficulty of their breathing workouts. Tailoring the inhalation and exhalation forces separately offers a personalized respiratory training experience that can accommodate the varying needs and progress rates of users."

Good

Use less , don't waste your money

My lungs 🫁 get better.my stamina is improving

Deducted 1 marks as the packaging could have been better.As per the effectiveness is concerned, as I never used such products, can tell after a month of use . Overall I think it should work as the breathing gets heavy while using and you can feel the lungs really working. A thumbs up