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dc.contributor.advisorHäkkinen, Keijo.
dc.contributor.authorIgendia, Mikael
dc.date.accessioned2015-12-07T09:08:20Z
dc.date.available2015-12-07T09:08:20Z
dc.date.issued2015
dc.identifier.otheroai:jykdok.linneanet.fi:1505447
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/48000
dc.description.abstractConscripts and soldiers have to perform their duties in a multistressor environment. During prolonged periods of combat training, fluctuations in strength levels and hormone concentrations have been noted. However, there is limited information regarding the changes in shooting performance and whether changes in strength and hormonal concentrations are correlated with it. This study examined strength levels, shooting performance and hormonal fluctuations during a 3-week combat training period. Possible correlations between the variables were examined and investigated. This study lasted for 37 days and involved 49 Finnish male conscripts as subjects. The subjects acted as their own controls during the first 11 days of the study. The control period was followed by a shooting camp which lasted for 5 days, and it was the first part of the prolonged combat training period. The following eight days consisted of combat camp1 (CC1) and immediately after that combat camp 2 (CC2) which also lasted 8 days. After the prolonged combat training period subjects had 5 days to recover. Measurements were taken on day 1, day 7, day 23, day 32, and day 37. The measurements included isometric leg press and isometric bench press for measuring strength levels of the lower and upper body. Shooting performance was measured from a standing and prone position. Serum cortisol, testosterone, and SHBG concentrations were analyzed from blood samples collected in a fasted state between 6.30am -7.30 am. Significant fluctuations were observed in leg strength (p≤0.05) which decreased as loading was high, and after day 23 when loading was decreased, leg strength levels increased. The score from shooting in a standing position also decreased as the loading was high and as the loads began to decrease after day 23 the shooting standing score improved (p≤0.001). The shooting prone score did not show any significant changes throughout the study period. Serum cortisol concentrations increased significantly (p≤0.001) during the prolonged combat training period. Serum testosterone concentrations decreased (p≤0.001) during the prolonged combat training period. Significant positive correlations were observed in the changes in shooting standing scores and changes in strength levels for legs and upper body (r=0.33-r=0.46, p≤0.05˗ p≤0.001). After 5 days of recovery, all measured variables except cortisol returned to baseline levels. The present findings showed that significant fluctuations in the strength levels, serum hormone concentrations and shooting scores took place during the prolonged combat training period. Changes in strength levels and changes in shooting performance were related as well as changes in serum cortisol concentrations and shooting standing score. Thus, a prolonged combat training period may have adverse effects in strength levels and the shooting ability in soldiers. Therefore, it is important that soldiers get an appropriate amount of rest while performing their duties.en
dc.format.extent1 verkkoaineisto (59 sivua)
dc.language.isoeng
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.subject.otherconscripts
dc.subject.otherstrength
dc.subject.othershooting
dc.subject.otherhormones
dc.subject.othersoldiers
dc.titleFluctuations in muscle strength, shooting accuracy and serum hormone concentrations in conscripts during a 3-week combat training period
dc.identifier.urnURN:NBN:fi:jyu-201512073919
dc.type.ontasotPro gradufi
dc.type.ontasotMaster's thesisen
dc.contributor.tiedekuntaLiikuntatieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sport and Health Sciencesen
dc.contributor.laitosLiikuntabiologian laitosfi
dc.contributor.laitosDepartment of Biology of Physical Activityen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineValmennus- ja testausoppifi
dc.contributor.oppiaineScience in Sport Coaching and Fitness Testingen
dc.date.updated2015-12-07T09:08:21Z
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi5013
dc.subject.ysoarmeijat
dc.subject.ysovarusmiehet
dc.subject.ysohormonit
dc.subject.ysoammunta


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