CARDIOVASCULAR RESPONSE TO RESISTANCE EXERCISE AT DIFFERENT LOAD INTENSITIES IN OBESE YOUNG ADULTS
The aim of this study was to assess and compare cardiovascular response to resistance exercise (RE)at different load intensities in normal-weight and obese young adults. Nine normal-weight and 10 obese men aged 20.8 ± 1.4 years were recruited. Subjects underwent leg press exercise with two different loads but the same exercise volume. A crossover model was applied in this study: 1) 16 repetitions at 40% of a one-repetition maximum (1RM) and 2) 8 repetitions at 80% of 1RM. The RE was designed to have 3 sets and 2 one-min rest intervals. Blood pressure (BP), heart rate (HR) and heart rate variability (HRV) were measured before, at the rest intervals and after the RE session. The results showed that the high-load intensity elicited greater HR compared to the low-load intensity in both groups (p<0.05, both). High-frequency (HF) of HRV in the normalweight group with the high-load intensity decreased significantly compared to the low-load intensity (p<0.05). However, there was no significant difference in HF between the load intensities in the obese group. In addition,systolic BP (SBP) and mean arterial pressure (MAP) were more elevated in the obese group than the normalweight group (p<0.05) during the RE with low-load intensity. Percentage of SBP (p<0.01) and MAP (p<0.05) were more elevated in the obese group than the normal-weight group during the RE with high-load intensity as well. In conclusion, the load intensities of RE affected HR in both groups; the higher intensity, the higher HR.Moreover, the obese group presented a more pronounced cardiovascular response compared to the normalweight group with either low- or high-load intensities during the RE. Our study suggested that the low- to moderate-load intensity of RE might be appropriate for the obese individuals.
(Journal of Sports Science and Technology 2019; 19(2): 46-59)
(Received: 21 May 2019, Revised: 19 September 2019, Accepted: 25 September 2019)
Key words: Blood pressure / Heart rate variability / Obesity / Resistance exercise
*Corresponding author: Jatuporn PHOEMSAPTHAWEE
Department of Sports Science and Health, Faculty of Sports Science, Kasetsart University
Nakhon Pathom, Thailand 73140
2. Aekplakorn W, Mo-Suwan L. Prevalence of obesity in Thailand. Obes Rev 2009;10:589-92.
3. Jensen MD, Ryan DH, Apovian CM, Ard JD, Comuzzie AG, Donato KA, et al.; American College of Cardiology/American Heart Association Task Force on Practice Guidelines; Obesity Society.2013 AHA/ACC/TOS guideline for the management of overweight and obesity in adults: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines and The Obesity Society. J Am Coll Cardiol 2014;63(25 Pt B):2985-3023.
4. Sharma AM. Obesity and cardiovascular risk. Growth Horm IGF Res 2003:13:10-7.
5. Haslam DW, James WP. Obesity. Lancet 2005;366(9492):1197-209.
6. Artham SM, Lavie CJ, Patel HM, Ventura HO. Impact of obesity on the risk of heart failure and its prognosis. J Cardiometab Syndr 2008;3(3):155-61.
7. Laederach-Hofmann K, Mussgay L, Ruddel H. Autonomic cardiovascular regulation in obesity.J Endocrinol 2000;164(1):59–66.
8. Pramodh V, Kumar MP, Prasad BA. Heart rate variability in overweight individuals. JDMS 2014;13(5):41-5.
9. Hirsch J, Leibel RL, Mackintosh R, Aguirre A. Heart rate variability as a measure of autonomic function during weight change in humans. Am J Physiol 1991;261(6Pt2):1418-23.
10. Poirier P, Hernandez TL, Weil KM, Shepard TJ, Eckel RH. Impact of diet-induced weight loss on the cardiac autonomic nervous system in severe obesity. Obes Res 2003;11(9):1040-7.
11. Willis LH, Slentz CA, Bateman LA, Shields AT, Piner LW, Bales CW, et al. Effects of aerobic and/or resistance training on body mass and fat mass in overweight or obese adults. J Appl Physiol 2012;113(12):1831-7.
12. Neto VG, Figueiredo T, Simões, AD, Bezerra MG, Barguti ST, Bentes CM, et al. Influence of load
intensity on blood pressure after a resistance training session. Apunts Med Esport 2017;52(193):23-8.
13. Phoemsapthawee J, Ladawan S, Settasatian N, Leelayuwat N. Effects of plasma lipids and abdominal obesity on heart rate variability in Thai overweight dyslipidemic individuals at Khon Kaen, Northeast Thailand. JMAT 2017;100:1174-83.
14. Moreira OC, Oliveira CEP, Matos DG, Silva SF, Hickner RC, Aidar FJ. Cardiovascular response to strength training is more affected by intensity than volume in healthy subjects. Rev Andal Med Deporte [Internet]. 2017. [cited 2019 ar 10]. Available from:https://www.sciencedirect.com/science/article/pii/S1888754617300278
15. Deurenberg P, Yap M, van Staveren WA. Body mass index and percent body fat: a meta analysis among different ethnic groups. Int J Obes Relat Metab Disord 1998;22(12):1164-71.
16. Maud PJ, Foster C. Physiological assessment of human fitness. Second ed. Illinois: Human Kinetics; 2006.
17. Haff GG, Triplett NT. Essentials of strength training and conditioning. Fourth ed. Illinois: Human Kinetics; 2016.
18. Vella CA, Paul DR, Bader J. Cardiac response to exercise in normal-weight and obese, Hispanic men and women: implications for exercise prescription. Acta Physiol 2012;205(1):113-23.
19. Ichinose M, Watanabe K, Fujii N, Kondo N, Nishiyasu T. Muscle metaboreflex activation speeds the recovery of arterial blood pressure following acute hypotension in humans. Am J Physiol Heart Circ Physiol 013;304(11):H1568-75.
20. Pescatello LS, Arena R, Riebe D, Thompson PD. ACSM’s guidelines for exercise testing and prescription. Ninth ed. Philadelphia: Lippincott Williams & Wilkins; 2014.
21. Franklin NC, Ali M, Goslawski M, Wang E, Phillips SA. Reduced vasodilator function following acute resistance exercise in obese women. Front Physiol 2014;5:253.