Radio 4 in Four - How much should you exercise if you’re ‘exercise naïve’? - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - How much should you exercise if you’re ‘exercise naïve’? - ÃÛÑ¿´«Ã½ Sounds
How much should you exercise if you’re ‘exercise naïve’?
Should we be worried about overdoing it when we're not used to exercising?