Customers report positive effects on lung capacity, noting improvements in stamina during workouts, enhanced lung strength, and significant cardio benefits. One customer mentions it provides resistance training for the muscles, while another notes it makes workouts more challenging.

Customers find this breathing trainer to be an incredible tool and the best lung training device available.

Customers find that the breathing trainer works incredibly well, particularly at working the diaphragm and improving performance, with one customer noting its effectiveness for hypoxic training.

Customers find the breathing trainer effective, noting it makes them think about proper technique and improves their training. One customer mentions the device offers multiple resistance levels through its end caps.

Customers find the breathing trainer simple to use and go together easily, with one customer noting it's simple to adjust the difficulty level.

Customers have mixed opinions about the breathing trainer's value, with some finding it worth the money while others feel it's not worth the price tag.

Customers have mixed experiences with the breathing trainer's comfort, with some finding the mouthpiece comfortable while others describe it as painfully uncomfortable.

Customers report issues with excessive drooling while using the breathing trainer, comparing it to drooling like a dog in a bacon factory, and one customer mentions inhaling a plastic particle into their mouth.