After the 1st excercise it starts at 7 seconds rest and then 26 seconds for the next excercises (Chrome/Win). I also wonder why the images or better the whole

After the 1st excercise it starts at 7 seconds rest and then 26 seconds for the next excercises (Chrome/Win). I also wonder why the images or better the whole site isn't responsive? I would also add a link to one of the sources.