國立虎尾科技大學 |

The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females./
Author:	Gann, Joshua J.
Description:	1 online resource (133 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
Contained By:	Dissertation Abstracts International79-01B(E).
Subject:	Physiology. -
Online resource:	click for full text (PQDT)
ISBN:	9780355176445

The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females.
Gann, Joshua J.

The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females. - 1 online resource (133 pages)

Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

The purpose of this study was to determine the effects of previous night dehydration on muscular strength, endurance, and lower-body power, perceptual measures, and markers of catabolism in resistance-trained females. Ten healthy, resistance-trained females completed two bouts of resistance exercise, either dehydrated (&sim;3% body weight) (DT) or heat exposed with fluid replacement (HT). Each exercise bout consisted of one rep maximum (1RM) followed by five sets to failure of 75% of 1RM for bench press and leg press, and vertical jump assessment. Muscle and blood samples were obtained prior to and 1hr following exercise. Blood samples were obtained to examine cortisol. From each muscle sample, glucocorticoid receptor-DNA (GR-DNA) binding and mRNA expression were determined. Bench press 1RM (p = 0.04) was significantly lower for DT compared to HT. No significant difference was found for leg press 1RM. There was no difference in total reps completed for bench press or leg press. No significant differences were found for total volume lifted for bench press or leg press or vertical jump. There were no significant interactions between session and time for any markers of mRNA expression. There was no significant interaction or main effects for session and time for serum cortisol. There was a significant main effect for session for GR- DNA binding (p = 043). GR-DNA binding was significantly elevated post exercise for DT (p = .016). Current results suggest that hypohydration may have a negative impacton bench press 1RM performance. Though the only performance measure to reach a statistically significant difference was bench press 1RM, there was a reduction in leg press 1RM and total volume lifted for both bench press and leg press. While this was an acute bout of only two exercises, it would be reasonable to suggest that this reduction in volume would continue for other exercises across a full workout. Additionally, GR-DNA binding was increased with hypohydration. Theoretically, if an individual were to be chronically hypohydrated, this reduction in volume and increase in GR-DNA binding could diminish the anabolic response to resistance exercise and potentially lead to muscle atrophy.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355176445Subjects--Topical Terms:

673386
Physiology.
Index Terms--Genre/Form:

554714
Electronic books.

The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females.
LDR:03515ntm a2200349Ki 4500 001 910276
005 20180511093053.5
006 m o u
007 cr mn||||a|a||
008 190606s2017 xx obm 000 0 eng d
020 $a 9780355176445
035 $a (MiAaPQ)AAI10615849
035 $a (MiAaPQ)baylor:10869
035 $a AAI10615849
040 $a MiAaPQ $b eng $c MiAaPQ
099 $a TUL $f hyy $c available through World Wide Web
100 1 $a Gann, Joshua J. $3 1181473
245 1 4 $a The Effects of Hypo hydration on Muscular Performance and Markers of Catabolism in Females.
264 0 $c 2017
300 $a 1 online resource (133 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
500 $a Adviser: Darryn S. Willoughby.
502 $a Thesis (Ph.D.) $c Baylor University $d 2017.
504 $a Includes bibliographical references
520 $a The purpose of this study was to determine the effects of previous night dehydration on muscular strength, endurance, and lower-body power, perceptual measures, and markers of catabolism in resistance-trained females. Ten healthy, resistance-trained females completed two bouts of resistance exercise, either dehydrated (&sim;3% body weight) (DT) or heat exposed with fluid replacement (HT). Each exercise bout consisted of one rep maximum (1RM) followed by five sets to failure of 75% of 1RM for bench press and leg press, and vertical jump assessment. Muscle and blood samples were obtained prior to and 1hr following exercise. Blood samples were obtained to examine cortisol. From each muscle sample, glucocorticoid receptor-DNA (GR-DNA) binding and mRNA expression were determined. Bench press 1RM (p = 0.04) was significantly lower for DT compared to HT. No significant difference was found for leg press 1RM. There was no difference in total reps completed for bench press or leg press. No significant differences were found for total volume lifted for bench press or leg press or vertical jump. There were no significant interactions between session and time for any markers of mRNA expression. There was no significant interaction or main effects for session and time for serum cortisol. There was a significant main effect for session for GR- DNA binding (p = 043). GR-DNA binding was significantly elevated post exercise for DT (p = .016). Current results suggest that hypohydration may have a negative impacton bench press 1RM performance. Though the only performance measure to reach a statistically significant difference was bench press 1RM, there was a reduction in leg press 1RM and total volume lifted for both bench press and leg press. While this was an acute bout of only two exercises, it would be reasonable to suggest that this reduction in volume would continue for other exercises across a full workout. Additionally, GR-DNA binding was increased with hypohydration. Theoretically, if an individual were to be chronically hypohydrated, this reduction in volume and increase in GR-DNA binding could diminish the anabolic response to resistance exercise and potentially lead to muscle atrophy.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Physiology. $3 673386
650 4 $a Kinesiology. $3 721210
655 7 $a Electronic books. $2 local $3 554714
690 $a 0719
690 $a 0575
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Baylor University. $b Health Human Performance and Recreation. $3 1181474
773 0 $t Dissertation Abstracts International $g 79-01B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10615849 $z click for full text (PQDT)