This is a variation of http://www.movescount.com/apps/app10011503-4in1_Cardiac_Drift_HR_maxHR_maxSPD made for interval trainings. Here is how it works - you switch with the help of Lap button between "Training" and "Rest" modes - the apps shows you every 3 secs: [*A*] In the TRAINING MODE: (1) TRN - duration in minutes (e.g. "TRN 0.5 min" means 30 seconds), (2) mxS - maximum speed in km/h (e.g. "mxS 5.4 kmh"), (3) mxH - maximum HR in beats per minute (e.g. "mxH 181.0 bpm"), (4) HR% - HR percentage according to Karvonen method (restHR=0%, maxHR=100%), e.g. "HR 67.3 %" (5) drf - Cardiac Drift in % that compares your performance between the current training mode and the previous (training - not resting) mode, e.g. "drf 5.6 %" means that you've worsen by 5.6% (e.g. to keep the same speed you needed to increase your HR by 5.6%) NOTE - it is NOT shown in the 1st Lap (only in 3rd, 5th, 7th, and so onn). [*B*] in the REST MODE: (1) RST - duration in minutes (e.g. "RST 1.5 min" means 90secon...