There are four possible explanations for this
phenomenon. Firstly, most participants complained
of muscle fatigue and knee pain after baseline
concentric isokinetic testing. They might try
performing lower force of knee extension at the
following tests. Therefore, TLE might decrease
because they fear developing knee pain. Secondly,
before and after the isokinetic testing, all participants
were instructed to perform muscle stretching. One
study revealed that a 2.8 percent decrease in knee
extension peak torque was found between
prestretching and post stretching exercise among
healthy young adults;55 stretching also altered the
muscle length-tension relationship and decreased
muscle power during the isokinetic muscle strength
testing. Thirdly, the provision of general information
regarding osteoarthritis of the knee may have
encouraged participants in the control group to
increase activity and independently perform exercise.
This result confirms previous findings56 that both
the exercise and education groups improved
isokinetic muscle strength after 8 weeks of the study.
For this study