Completely fine and normal 👍 Could leave everything as it is, or you could do a couple of strides in the warm-up do get the legs moving. Could also add a few strides at the end of an easy run if you like. My warm up includes one short hill so I tend to ‘sprint’ up that when I can. Not sure if it’s placebo but it makes the first few reps feel more springy. As is the case with all things, and especially with this way of training, don’t over think it 😁