Influence of Core Muscles Activation Using Physical Fitness on the Performance of Chest Compression

"2 instructors, they had physical therapy (PT) certificate, take an exam for subject's muscle strength of each muscle. After that time, subjects take a rest for 10 minutes. Researchers educate to subjects for high quality CPR including 5 to 6cm compression depth, 100 to 120 beat per minute (bpm) rate, complete chest recoil. Subjects perform chest compression to manikin with skill reporting system during 4min under guidance of 110 bpm metronome sound (first chest compression). After 1st chest compression, subjects take a rest during an hour and carry out PT. PT consist of 30 second plank for 3 sets, 12 times bridge for 3 sets and 20 times leg extension for 3 sets. Subjects take a rest during 30 seconds between sets, 1 minute every 3 sets.~After PT completion, subjects take a rest during 10 minutes, and then perform 2nd chest compression in the same way of 1st chest compression. Researchers record subject's chest compression depth and rate in 1st and 2nd chest compression."