I was looking to see if there was any info on here about peak flow home testing but the CPET pages just seemed to pop up. I borrowed someones piko-1 device the other day and was stunned to see i can't blow properly! I can't remember the readings yesterday but i was in the amber zone. This morning i was also in the amber zone with readings like: FEV: 1.41 PEF: 266 But just done it now when i'm really exhausted and i'm stuck in the red zone with very low readings. FEV: 0.62 PEF: 100 FEV: 0.49 PEF: 85 FEV: 0.25 PEF: 62 I can't try anymore but the machine is constantly giving me the exclamation marks telling me i've either got a cough or doing it wrong but i don't have the strength to blow any harder. I've asked to borrow the device so i can try it over the next 7 days. Has anyone else got one of these devices? Theyre usually used to manage asthma and COPD.