Can elevation training masks improve your endurance?

Q&A with Dr. Manny: I read athletes use elevation training masks to build up their lung capacity and improve their overall fitness, but do they really work?
Q&A with Dr. Manny: I read athletes use elevation training masks to build up their lung capacity and improve their overall fitness, but do they really work?
Do elevation training masks work?

Elevation Training Masks And Whether They Really Work

TRAININGMASK - 2.0 Multi Patened with Clincal Studies - Elevation Training Mask, High Altitude Workout Endurance Mask, Running Mask, Breathing Mask (Small, Blackout) : Sports & Outdoors

Aduro Adurance High Altitude Breathing Training Exercise Mask New-Open Box 849813019850

Altitude training masks: an unbiased review of effectiveness

Elevation Training Mask - How to Use and Benefits

Altitude Training: Does It Work and How to Do

TRAININGMASK - Elevation Training Mask 2.0 - Fitness Mask, High Altitude Mask, Workout Mask, Running Mask, Breathing Mask, Endurance Mask (Small, Black) : Altitude Training Mask : Sports & Outdoors