Band 7+: Do you do much exercise?

Your pronunciation is very good. Aim to refine subtleties and intonation to further improve.

This is a good response that directly addresses the question. Consider expanding on the types of exercises you enjoyed and perhaps mentioning any future plans for exercise or alternative activities you're exploring.

The answer is coherent and mostly fluent. There's a slight hesitation and run-on sentence in the first part ("I used to in the past when I was younger..."). Adding a short pause or breaking it into two sentences would improve fluency. The overall structure is clear and easy to follow.

The vocabulary is adequate and appropriate for the topic. Words like "lifting weights" and "heavy exercise" are precise. More sophisticated vocabulary could be used to describe the knee problems (e.g., "degenerative joint disease", "arthritis"), but this isn't strictly necessary for a band 7.

Grammar is mostly accurate. There are a few minor issues with sentence structure and tense consistency (e.g., mixing past simple and past continuous). While understandable, refining the sentence structure would improve grammatical range and accuracy. For example, instead of "I have some problems in my knees that prevent me", consider "My knee problems prevent me".