... mess. I am perfectly fine now and can easily climb long stairs and hills with zero discomfort. But recalling the experience led me to build a timer for myself and for anyone who needed an all purpose multi interval

... train a lot HIIT, strength, functional fitness and I've tried every intervaltimer out there. They all have similar problems! Too many screens to set up a workout, clunky UIs you can't read mid-set, or they want you to create an account just to start a