Elsa has been spending a lot of time on the stair machine at her gym. She is starung to feel really sore in her knees, but she ngures that it is not a big deal since exercise often makes people ache What is the BEST advice for Elsa? OA She is right to think that soreness is part of working out OB. She is probably using the stair machine wrong if she is sore. The soreness means that the concentric exercises are doing their job. Concentric exercise can be hard on joints, so she should be very careful Reset Wext​