Figure 1
From: Effect of acute hypoxia on respiratory muscle fatigue in healthy humans
Changes in transdiaphragmatic twitch pressure (P di,tw ) during cervical magnetic stimulation immediately after and 30 min after the 15-min hyperpnoea test in normoxia (diamond), hypoxia (triangle) and hyperoxia (square). Values are mean ± SD. All values were significantly reduced immediately after and 30 min after hyperpnoea compared to before hyperpnoea. ** significantly different from normoxia and hyperoxia (P < 0.01).