Articles in PresS. Am J Physiol Endocrinol Metab (November 25, 2014). doi:10.1152/ajpendo.00689.2013

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Anabolic Responses to Acute and Chronic Resistance Exercise Are Enhanced When

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Combined With Aquatic Treadmill Exercise

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Lambert, B.S. 1, Shimkus, K.L.2, Fluckey, J.D.2, Riechman, S.E.3, Greene, N.P.4, Cardin, J.M.2,

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Crouse, S.F.1

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Affiliations:

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1

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Station, TX 77843

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Applied Exercise Science Laboratory, Department of Health & Kinesiology, Texas A&M University, College

Muscle Biology Laboratory, Department of Health & Kinesiology, Texas A&M University, College Station, TX

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77843

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Station, TX 77843

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Arkansas, Fayetteville, AR 72701

Human Countermeasures Laboratory, Department of Health & Kinesiology, Texas A&M University, College

Human Performance Laboratory, Department of Health, Human Performance and Recreation, University of

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Running Title: ATM Running Enhances Adaptations to Resistance Training

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Author Contributions: BSL and SFC are responsible for conception of the study; BSL, NPG, JDF, SER, and SFC are

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responsible for the study design; BSL, NPG, JDF, and SER were involved in collection of the data; BSL analyzed

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all muscle samples with assistance from KLS and JMC; BSL prepared figures and drafted the manuscript; All co-

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authors revised and edited the manuscript; SFC approved the final manuscript.

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Corresponding Author:

Brad S. Lambert

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[email protected]

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Department of Nutrition and Metabolism

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University of Texas Medical Branch

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301 University Blvd.

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Galveston, TX 77555

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Copyright © 2014 by the American Physiological Society.

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Abstract

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muscle growth when combined with resistance training (RT) compared to land-treadmill (LTM)

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running. Therefore, we examined acute and chronic physiological responses to RT, concurrent

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RT-LTM and concurrent RT-ATM. Forty-seven untrained volunteers (♂n=23, 37±11yr,

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29.6±4.6 kg·m2| ♀n=24, 38±12yr, 27.53±6.4 kg·m2) from the general population were tested for

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VO2max, body composition, and strength before and after training. All groups performed 12wks

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of RT (2·wk, 3 x 8-12 @ 60→~80%1RM). The RT-LTM & RT-ATM groups also performed

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12wks of LTM or ATM training [2·wk (immediately post RT), 1·wk (in isolation),

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60→85%VO2max, 250→500 kcal·session]. Additionally, 25 subjects volunteered for muscle

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biopsy prior to, and 24h-post acute exercise before and after training. Stable isotope labeling

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(70%2H2O, 3ml·kg-1) was utilized to quantify 24h-post exercise myofibrillar fractional synthesis

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rates (myoFSR). Mixed-model ANOVA revealed that RT-ATM, but not RT-LTM training

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produced greater chronic increases in lean mass than RT alone (p

Anabolic responses to acute and chronic resistance exercise are enhanced when combined with aquatic treadmill exercise.

Aquatic treadmill (ATM) running may simultaneously promote aerobic fitness and enhance muscle growth when combined with resistance training (RT) compa...
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