01:377:493 Lecture Notes - Lecture 1: Glykeria, Quadriceps Femoris Muscle, Parkour

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Kayla Davenport
Internship: Greece
Dr. Glykeria Psarra
June 29, 2018
Attikon Physiology Lab Analysis and Interpretation
While at the Attikon University Hospital, we spent three days in their physiology lab. It
was here where we learned how to conduct exercise tests and use health assessment
equipment. To test out how much we retained from the miniature lesson given, we conducted
four different assessments on four of our peers. The first three participants took their
assessment on a machine known as a Biodex, which is an isokinetic machine that supplies a
computer-controlled resistance. The first three of the experiments evaluated the following:
peak torque with and without body weight, total work, average power,
acceleration/deceleration time, range of motion, and antagonistic/antagonistic ratio. This
specific evaluation done on the knee, lumbar and shoulder joints. Following the assessments on
the Biodex machine, we conducted a VO2MAX test on one of our peers.
The first assessment focused on the comparison of bilateral isokinetic knee extensions
and flexions. With our peer Francesca, we wanted to analyze both of her legs to see if there
there was a dominance in one leg that was causing an imbalance of strength between the
contralateral muscle groups. We also wanted to see whether her hamstring or quadriceps
displayed dominance over the other. This is an important test for professional sports players
because the imbalances of a muscle may cause the player to develop a predisposition for injury
in that body part. We began to test extension and flexion by instruction her to complete 5
repetitions at 60 degrees per second for both her right and left leg. We then gave her a short
break and continued the test by increasing the number of repetitions to 10 at 180 degrees per
second. Finally, we instructed her to complete 15 repetitions at 300 degrees per second. For
extensions at 60 degrees per second, we found that Francesca’s peak torque was 18.1 N-M
greater than her left leg. Another noteworthy finding was, in regards to average power,
Francesca’s right leg was 40.3 Watts stronger than the left. In regards to the
agonistics/antagonistic ratio, it came out to be 71%, which indicated that there is a discrepancy
between her hamstring and quadriceps. In regards to flexion, both legs did not have a varying
deficit. When we increased Francesca’s angle to 180 and 300 degrees per second, the results
were consistent with was we found at 60 degrees per second. After analyzing this data, the
results indicated that Francesca had a stronger extension, or quadriceps, regardless of the angle
the repetitions were at. In order to help balance Francesca’s leg muscles, I would advise that
she do 10-20 repetitions for 2 sets of Romanian deadlifts, glute-hamstring raises, box squats,
and single-leg stiff-leg deadlifts. This is a short list of the many exercises that one can do to
strengthen their hamstring. I would also recommend that she do front squats, dumbbell step-
ups, and walking lunges on her left leg balance out her leg strength.
The next assessment was analyzing Cindy’s lumbar region to see if there were
imbalances between extension and flexion. For Cindy, we measured these two motions at 60,
90 and 120 degrees per seconds. She completed 5 repetitions for 60 degrees, 10 for repetitions
for 90 degrees and 15 repetitions for 120 degrees. While interpreting the data, it appears that
her lumbar is quite balanced, however her extension was a bit stronger than flexion. One
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