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Effect of different pre application time intervals of light emitting diode therapy on muscle fatigue / Mai Raouf Mohamed Rageh ; Supervised Abeer Abdelrahman Yamany , Hamada Ahmed Hamada , Rania Reda Mohamed

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Mai Raouf Mohamed Rageh , 2021Description: 122 P. : charts , facsimiles ; 25cmOther title:
  • تأثير فترات أوقات التطبيق المسبق المختلفة للصمام الثنائى العلاجى الباعث للضوء على الاجهاد العضلى [Added title page title]
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Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Physical Therapy - Department of Basic Sciences Summary: Background: Although Photobiomodulation therapy (PBMT) had shown its effectiveness as a muscular preconditioning modality to resist fatigue, the identification of the best point of time to irradiate muscle tissue is contradictory and needs further investigation. purpose: To detect the time of optimum response of PBMT by near-infrared (NIR) light emitting diode (LED) on muscle fatigue resistance of elbow flexor muscles. Design: A randomized, single blind, pre{u2013}test post-test, placebo-controlled crossover study. Participants: Forty-five healthy nonathletic participants of both sexes were randomly allocated to 3 equal groups: 5 minutes, 1-hour or 5-hours groups. Interventions: Each group (number=15) received either active(60J) or placebo(0J) (conditions) NIR-LED of 890 nm wavelength at the first session before fatigue inducing exercise; by 5 minutes, 1 hour, or 5 hours according to their random allocation within the groups and application condition, then after 7 days washout period, received the other condition of NIR-LED before exercise at the second session. Outcome measures: each session using isokinetic dynamometer, isometric peak torque (IMPT) and isokinetic peak torque (IKPT) were evaluated at base line and post exercise as well as assessing strength loss index (SLI) and number of repetitions to reach fatigue (NRRF) post exercise. Results: Pre NIR-LED application there was no statistically significant difference between groups and between conditions in IMPT and IKPT (p > 0.05). There was a statistically significant decrease in IMPT and IKPT post treatment compared with that pre-treatment (p < 0.01), but the 5 minutes group showed the least percent of decrease compared to other groups. There was a statistically significant decrease in SLI and statistically significant increase in NRRF in the 5 minutes group in active condition compared with that of 1 hour and 5 hours groups and compared to the placebo condition (p < 0.05)
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.21.09.Ph.D.2021.Ma.E (Browse shelf(Opens below)) Not for loan 01010110084883000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.21.09.Ph.D.2021.Ma.E (Browse shelf(Opens below)) 84883.CD Not for loan 01020110084883000

Thesis (Ph.D.) - Cairo University - Faculty of Physical Therapy - Department of Basic Sciences

Background: Although Photobiomodulation therapy (PBMT) had shown its effectiveness as a muscular preconditioning modality to resist fatigue, the identification of the best point of time to irradiate muscle tissue is contradictory and needs further investigation. purpose: To detect the time of optimum response of PBMT by near-infrared (NIR) light emitting diode (LED) on muscle fatigue resistance of elbow flexor muscles. Design: A randomized, single blind, pre{u2013}test post-test, placebo-controlled crossover study. Participants: Forty-five healthy nonathletic participants of both sexes were randomly allocated to 3 equal groups: 5 minutes, 1-hour or 5-hours groups. Interventions: Each group (number=15) received either active(60J) or placebo(0J) (conditions) NIR-LED of 890 nm wavelength at the first session before fatigue inducing exercise; by 5 minutes, 1 hour, or 5 hours according to their random allocation within the groups and application condition, then after 7 days washout period, received the other condition of NIR-LED before exercise at the second session. Outcome measures: each session using isokinetic dynamometer, isometric peak torque (IMPT) and isokinetic peak torque (IKPT) were evaluated at base line and post exercise as well as assessing strength loss index (SLI) and number of repetitions to reach fatigue (NRRF) post exercise. Results: Pre NIR-LED application there was no statistically significant difference between groups and between conditions in IMPT and IKPT (p > 0.05). There was a statistically significant decrease in IMPT and IKPT post treatment compared with that pre-treatment (p < 0.01), but the 5 minutes group showed the least percent of decrease compared to other groups. There was a statistically significant decrease in SLI and statistically significant increase in NRRF in the 5 minutes group in active condition compared with that of 1 hour and 5 hours groups and compared to the placebo condition (p < 0.05)

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