NDLI: The salivary testosterone and cortisol response to three loading schemes.

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The salivary testosterone and cortisol response to three loading schemes.

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The salivary testosterone and cortisol response to three loading schemes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Crewther, Blair Cronin, John Keogh, Justin Cook, Christian
Description	Country affiliation: New Zealand Author Affiliation: Crewther B ( Health and Food Group, Hort Research, Auckland, New Zealand. BCrewther@Hortresearch.co.nz)
Abstract	This aim of this study was to examine the free hormone (in saliva) responses to squat workouts performed by recreationally weight-trained males, using either a power (8 sets of 6 reps, 45% 1 repetition maximum [1RM], 3-minute rest periods, ballistic movements), hypertrophy (10 sets of 10 reps, 75% 1RM, 2-minute rest periods, controlled movements), or maximal strength scheme (6 sets of 4 reps, 88% 1RM, 4-minute rest periods, explosive intent). To determine the relative importance of the different training variables, these schemes were equated by workout duration with the power and strength schemes also equated by load volume. Salivary testosterone (T) and cortisol (C) both increased following the hypertrophy scheme (P < 0.05), with little to no hormonal change across the power and maximal strength schemes (P > 0.05). In general, the postexercise T and C responses to the hypertrophy scheme exceeded the other two schemes (P < 0.05). The greater volume of load lifted in the hypertrophy protocol over the same workout duration may explain the endocrine differences observed. The similar T and C responses to the power and maximal strength schemes (of equal volume) support such a view and suggest that differences in load intensity, rest periods, and technique are secondary to volume. Because the acute hormonal responses to resistance exercise contribute to protein metabolism, then load volume may be the most important workout variable activating the endocrine system and stimulating muscle growth.
File Format	HTM / HTML
ISSN	10648011
Issue Number	1
Volume Number	22
e-ISSN	15334287
Journal	Journal of Strength and Conditioning Research
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2008-01-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Sport Sciences Exercise Physiology Hydrocortisone Metabolism Physical Exertion Testosterone Weight Lifting Adaptation, Physiological Adult Cohort Studies Humans Analysis Male Physical Education And Training Methods Saliva Chemistry Sensitivity And Specificity Sports Weight-bearing Comparative Study Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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