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Effect of exercise order on endocrine and metabolic responses to concurrent exercise
Author(s) -
Aguirre Nicholas W.,
Tan Jeremy G.,
Coats Daniel R.,
Spiering Barry A.,
Brown Lee E.,
Coburn Jared W.,
Rubin Daniela A.,
Judelson Daniel A.
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.26.1_supplement.1142.42
Subject(s) - endocrinology , medicine , squat , bench press , time trial , endurance training , resistance training , hormone , endocrine system , lactate threshold , blood lactate , physical therapy , heart rate , blood pressure
Despite its popularity, few studies characterize the acute hormonal and metabolic responses to combined endurance and resistance exercise (concurrent exercise, CE). Since exercise order might influence training adaptations, elucidating these acute responses might contribute to optimizing program design. The purpose of this study was to examine the effects of CE order on endocrine and metabolic responses. Nine healthy, concurrently trained males (age = 22.7 ± 1.7 y; mass = 84.8 ± 11.9 kg; height = 176.1 ± 7.4 cm) performed two CE trials: resistance exercise (squat, bench press, lat pulldown: 60% 1‐RM, 4 sets × 10 reps, 90‐s rest intervals) followed by endurance exercise (RE‐EE) and EE (cycling: 80% ventilatory threshold for 30‐min) followed by RE (EE‐RE). Growth hormone, testosterone, cortisol, glucose, lactate (Lac) and free fatty acids were measured prior to CE, between exercise bouts, following CE, and 15, 30, and 60 minutes post‐CE. [Lac] was significantly greater at all post‐CE time points in EE‐RE (AUC = 909 ± 123 mmol•min/L) than RE‐EE (AUC = 777 ± 93 mmol•min/L). Plausibly, enhanced lactate metabolism during EE reduced [Lac] in RE‐EE. No differences were observed between trials for any other variable. Thus, differences in concurrent training adaptations predicated on CE order might not derive from humoral variations. Funding provided by California State University, Fullerton.