What self-assessments can you do to determine whether you are at risk for back pain ?

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.

what are the options that have to match them to?

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.