@juradofco I use manual laps to record intervals and its rest times on the track , that way you have all the details after the fact in watch and Suunto app, pace is spot on when using stryd (without stryd Suunto 9 pace was usually good enough but it’s been a while since I last ran without stryd) after you run some secs on the speed/pace you’ll be lock in, for me it’s about being focused and not taking many looks at the watch while running the interval distance on the track, once on the rest period of the interval , I look at the lab table on the watch and see how I did on these last effort while being ready for the next interval.