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Circuit weight training and cardiac morphology: a trial with magnetic resonance imaging.
Br J Sports Med. 2008 Feb; 42(2):141-5; discussion 145.BJ

Abstract

BACKGROUND

Aerobic training (AT) and circuit weight training (CWT) improve peak oxygen uptake (VO(2)peak). During CWT the circulatory system is exposed to higher pressure, which could induce left ventricle morphological adaptations, possibly distinct from those derived from aerobic training.

OBJECTIVE

To compare the effects of aerobic training and CWT upon morphological and functional cardiac adaptations detected by magnetic resonance imaging.

METHODS

Twenty healthy sedentary individuals were randomly assigned to participate in a 12-week programme of aerobic training (n = 6), CWR (n = 7) or no intervention (n = 7, controls). Training programmes consisted of 36 sessions, 35 min each, 3 times per week, at 70% of maximal heart rate, and CWT included series of resistance exercises performed at 60% of 1 maximal repetition. Cardiopulmonary exercise testing and cardiac magnetic resonance imaging were performed before and after the intervention.

RESULTS

There was a similar improvement in VO(2)peak following aerobic training (mean (SD) increment: 12 (4)%) and CWT (12 (4)%), while there was no change in the control group. Aerobic training (12 (6)%) and CWT (16 (5)%) improved strength in the lower limbs, and only CWT resulted in improvement of 13 (4)% in the strength of the upper limbs. However, there were no detectable changes in left ventricular mass, end-diastolic volume, stroke volume or ejection fraction.

CONCLUSION

In previously sedentary individuals, short-term CWT and aerobic training induce similar improvement in functional capacity without any adaptation in cardiac morphology detectable by cardiac magnetic resonance imaging.

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Authors+Show Affiliations

Camargo MD
Institute of Cardiology of Rio Grande do Sul/FUC (IC/FUC), Porto Alegre, Brazil.
Stein R
No affiliation info available
Ribeiro JP
No affiliation info available
Schvartzman PR
No affiliation info available
Rizzatti MO
No affiliation info available
Schaan BD
No affiliation info available

MeSH

AdultExerciseExercise TestHeart VentriclesHumansMagnetic Resonance ImagingMaleMuscle StrengthOxygen ConsumptionProspective StudiesVentricular Function, LeftWeight Lifting

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17586582

Citation

Camargo, M D., et al. "Circuit Weight Training and Cardiac Morphology: a Trial With Magnetic Resonance Imaging." British Journal of Sports Medicine, vol. 42, no. 2, 2008, pp. 141-5; discussion 145.
Camargo MD, Stein R, Ribeiro JP, et al. Circuit weight training and cardiac morphology: a trial with magnetic resonance imaging. Br J Sports Med. 2008;42(2):141-5; discussion 145.
Camargo, M. D., Stein, R., Ribeiro, J. P., Schvartzman, P. R., Rizzatti, M. O., & Schaan, B. D. (2008). Circuit weight training and cardiac morphology: a trial with magnetic resonance imaging. British Journal of Sports Medicine, 42(2), 141-5; discussion 145.
Camargo MD, et al. Circuit Weight Training and Cardiac Morphology: a Trial With Magnetic Resonance Imaging. Br J Sports Med. 2008;42(2):141-5; discussion 145. PubMed PMID: 17586582.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Circuit weight training and cardiac morphology: a trial with magnetic resonance imaging. AU - Camargo,M D, AU - Stein,R, AU - Ribeiro,J P, AU - Schvartzman,P R, AU - Rizzatti,M O, AU - Schaan,B D, Y1 - 2007/06/22/ PY - 2007/6/26/pubmed PY - 2008/5/10/medline PY - 2007/6/26/entrez SP - 141-5; discussion 145 JF - British journal of sports medicine JO - Br J Sports Med VL - 42 IS - 2 N2 - BACKGROUND: Aerobic training (AT) and circuit weight training (CWT) improve peak oxygen uptake (VO(2)peak). During CWT the circulatory system is exposed to higher pressure, which could induce left ventricle morphological adaptations, possibly distinct from those derived from aerobic training. OBJECTIVE: To compare the effects of aerobic training and CWT upon morphological and functional cardiac adaptations detected by magnetic resonance imaging. METHODS: Twenty healthy sedentary individuals were randomly assigned to participate in a 12-week programme of aerobic training (n = 6), CWR (n = 7) or no intervention (n = 7, controls). Training programmes consisted of 36 sessions, 35 min each, 3 times per week, at 70% of maximal heart rate, and CWT included series of resistance exercises performed at 60% of 1 maximal repetition. Cardiopulmonary exercise testing and cardiac magnetic resonance imaging were performed before and after the intervention. RESULTS: There was a similar improvement in VO(2)peak following aerobic training (mean (SD) increment: 12 (4)%) and CWT (12 (4)%), while there was no change in the control group. Aerobic training (12 (6)%) and CWT (16 (5)%) improved strength in the lower limbs, and only CWT resulted in improvement of 13 (4)% in the strength of the upper limbs. However, there were no detectable changes in left ventricular mass, end-diastolic volume, stroke volume or ejection fraction. CONCLUSION: In previously sedentary individuals, short-term CWT and aerobic training induce similar improvement in functional capacity without any adaptation in cardiac morphology detectable by cardiac magnetic resonance imaging. SN - 1473-0480 UR - https://www.unboundmedicine.com/medline/citation/17586582/Circuit_weight_training_and_cardiac_morphology:_a_trial_with_magnetic_resonance_imaging_ L2 - https://bjsm.bmj.com/lookup/pmidlookup?view=long&pmid=17586582 DB - PRIME DP - Unbound Medicine ER -