Hello and welcome! Well done for starting. Chances are you are going too fast! Also change shoes, walking shoes are rigid and not what you need. If you are serious about the programme, do go to an independent spirt shop and ask for a gait analysis, it will help you get the correct shoes. Let us know how you get on!
Perhaps you are running too fast or are not hydrated enough, just take all your runs slow and steady, it's not a race, have two days off and then run/walk run 2 of week 3, hopefully you won't 'feel like hell' after the run. 🏃
Welcome to the forum and well done on getting started.
This guide to the plan is essential reading healthunlocked.com/couchto5... and explains the recommended easy conversational pace, which makes the whole thing so much more enjoyable and doable, whilst still developing your stamina.
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