Hi
Sw classes don't actually include exercise, but there is a book in your Sw pack about 'body magic' (ie exercise).
Sw recognise any type of exercise, from walking to hoovering, bike riding to kayaking! You can earn awards based on the level of exercise that you do and maintain and then need to increase the amount of exercise you do to earn the next award!
Gyms aren't compulsory, nor is exercise at all really but it is a good idea. Try a simple walk to the shops or round the local park to get you started xx