The key answer of exercise 2

b)

• Rule 1 → 6
• Rule 2 → 4
• Rule 3 → 2
• Rule 4 → 3
• Rule 5 → 5
• Rule 6 → 1

c)

1. Often at the beginning of the year people decide to change something significant in their lives which they see as a problem, e.g. lose weight, stop smoking, etc. However, these resolutions can be too big and look for a quick solution so often people lose motivation after a short time.
2. If you are bad (inefficient) at an exercise, your body will have to work harder and will therefore burn more calories.
3. The writer assumes that some readers might look down on fitness classes (don't turn your nose up at fitness classes').
4. Lifting weights helps you add more muscle and more muscle results in burning more energy when you're not exercising, which will then lead to more weight loss.
5. 1 → it burns fat, 2 → it increases your ability to burn calories, 3 → it's efficient for the time available.
6. Weight loss doesn't necessarily lead to being healthier or fitter, and particularly if you add muscle you might not weigh less, but you'll achieve the more important goal of feeling and looking better, and being healthier.