Remotely Supervised Home-Based Resistance Training and Orthostatic Tolerance in Young Physically Inactive Women During COVID-19
Main Article Content
Keywords
Resistance bands, autonomic nervous system, cardiovascular
Abstract
Introduction: Orthostatic intolerance (OI) is the inability of the cardiovascular system to adequately adjust to gravity upon standing, resulting in lightheadedness or syncope. OI can be characteristic of pathology (e.g. postural orthostatic tachycardia syndrome), which disproportionately affect women, and is compounded by inactivity. Thus, we tested the effects of remotely supervised home-based, 4-week resistance training (RT) program vs. control on the orthostatic stress response of previously inactive young females using the NASA Lean Test (NLT).
Methods: Systolic (SBP) and diastolic (DBP) blood pressures, and heart rate (HR) were assessed during the NLT, pre- and post-training, along with fitness and body composition in females randomized to RT or control (n=7).
Results: RT improved fitness (group*intervention, p=0.047) and fat-mass (-3.4±2.9 vs. +0.3±0.7Δlbs, p=0.037) over control. The NLT significantly altered SBP, DBP, and HR (all, p<0.01). For SBP, the interaction of group*intervention approached significance (p=0.071), lowering SBP in the RT group with the intervention. In DBP, the group*intervention was not significant (p=0.558). For HR, the group*intervention interaction approached significance (p=0.066).
Conclusions: In the current study, short-term remotely-supervised RT using bands tended to decrease SBP and HR during orthostatic stress in young, otherwise healthy, previously inactive females, suggesting improved health but perhaps not orthostatic tolerance.
References
2. Colado JC, Triplett NT. Effects of a short-term resistance program using elastic bands versus weight machines for sedentary middle-aged women. J Strength Cond Res 22(5): 1441-1448, 2008.
3. Fu Q, VanGundy TB, Galbreath MM, Shigeki S, Jain M, Hastings JL, Bhella PS, Levine BD. Cardiac origins of the postural orthostatic tachycardia syndrome. J Am Coll Cardiol 55(25): 2858-2868, 2010.
4. Fu Q, Levine BD. Exercise and non-pharmacological treatment of POTS. Auton Neurosci 215: 20-27, 2018.
5. Gomes MFP, Borges ME, Rossi VA, deMoura EOC, Medeiros A. The effect of physical resistance training on baroreflex sensitivity of hypertensive rats. Arq Bras Cardiol 108(6): 539-545, 2017.
6. Joyner MJ. Standing up for exercise: should deconditioning be medicalized? J Physiol 590(15): 3413-3414, 2012.
7. Lee J, Vernon SD, Jeys P, Ali W, Campos A, Unutmaz D, Yellman B, Bateman L. Hemodynamics during the 10-minute NASA Lean Test: evidence of circulatory decompensation in a subset of ME/CFS patients. J Transl Med 18(1): 314, 2020.
8. Navalta JW, Stone WJ, Lyons TS. Ethical issues relating to scientific discovery in exercise science. Int J Exerc Sci 12(1): 1-8, 2019.
9. Stewart JM. Chronic orthostatic intolerance and the postural tachycardia syndrome (POTS). J Pediatr 145(6): 725-730, 2004.
10. Stewart JM, Boris JR, Chelimsky G, Fischer PR, Fortunato JE, Grubb BP, Heyer GL, Jarjour IT, Medow MS, Numan MT, Pianosi PT, Singer W, Tarbell S, Chelimsky TC. Pediatric disorders of orthostatic intolerance. Pediatrics 141(1): e20171673, 2018.
11. Stickford ASL, VanGundy TB, Levine BD, Fu Q. Menstrual cycle phase does not affect sympathetic neural activity in women with postural orthostatic tachycardia syndrome. J Physiol 593(9): 2131-2143, 2015.
12. Taneja I, Medow MS, Clarke DA, Ocon AJ, Stewart JM. Baroreceptor unloading in postural tachycardia syndrome augments peripheral chemoreceptor sensitivity and decreases central chemoreceptor sensitivity. Am J Physiol Heart Circ Physiol 301(1): 173-179, 2011.
13. van Lieshout JJ. Exercise training and orthostatic intolerance: a paradox? J Physiol 551(2): 401, 2003.
14. van Lieshout JJ, Pott F, Madsen PL, van Goudoever J, Secher NH. Muscle tensing during standing: effects on cerebral tissue oxygenation and cerebral artery blood velocity. Stroke 32(7): 1546, 2001.
15. Wieling W, van Lieshout JJ, Hainsworth R. Extracellular fluid volume expansion in patients with posturally related syncope. Clin Auton Res 12(4): 242-249, 2002.
16. Williams RD, Barnes JT, Pujol TJ. Comparison of body composition assessment techniques in a non-athletic, non-obese young adult population. J Strength Cond Res 24(1): 2010.Johnson J, Johnson B, Stella CA. Maximum distance and performance measures in football. J Exerc and Nutr. 2017;1(1). Doi: 101010202012.