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Hemodynamic Responses and Perceived Exertion During Continuous and Discontinuous Resistance Exercise
R Massaferri1, L Matos-Santos2, P Farinatti3
1Salgado de Oliveira University, PGCAF, Niterói, Brazil.
International Journal of Sports Medicine
|August 8, 2015
Summary
Discontinuously performed resistance exercise, with short pauses, significantly increases blood pressure and cardiac output compared to continuous exercise. However, this method lowers the rate of perceived exertion, making workouts feel easier.
Area of Science:
- Exercise Physiology
- Cardiovascular Response to Exercise
- Resistance Training
Background:
- Understanding the acute physiological responses to different resistance exercise protocols is crucial for optimizing training.
- Continuous versus discontinuous resistance exercise may elicit distinct hemodynamic and perceptual responses.
- Previous research has not fully elucidated the comparative effects of varying pause durations within discontinuous sets.
Purpose of the Study:
- To compare the acute hemodynamic responses and rate of perceived exertion (RPE) between continuous and discontinuous resistance exercise.
- To investigate the influence of short intra-set pauses (5s and 10s) on physiological outcomes during resistance exercise.
Main Methods:
- Participants performed knee extensions at 70% of their 12 repetition maximum.
- Exercise protocols included continuous (C), discontinuous with 5s pauses (D5), and discontinuous with 10s pauses (D10).
- Systolic blood pressure (SBP), diastolic blood pressure (DBP), cardiac output (Q), heart rate (HR), stroke volume (SV), total peripheral resistance (TPR), and RPE were measured.
Main Results:
- Discontinuous protocols (D5, D10) resulted in significantly higher increases in SBP compared to continuous (C).
- Cardiac output (Q) and stroke volume (SV) were elevated, while heart rate (HR) was lower during discontinuous exercise.
- Total peripheral resistance (TPR) decreased during pauses in discontinuous protocols, and RPE was attenuated compared to continuous exercise.
Conclusions:
- Discontinuous resistance exercise exacerbates acute hemodynamic responses, particularly blood pressure and cardiac output, compared to continuous protocols.
- The inclusion of short intra-set pauses in resistance exercise lowers the overall perceived exertion.
- These findings suggest that discontinuous protocols may offer a way to increase exercise intensity while potentially improving tolerance.
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