Acute hemodynamic and cardiovascular responses following resistance exercise to voluntary exhaustion. Effects of different loadings and exercise durations

作者：Gjovaag Terje^*; Hjelmeland Asmund K; Oygard Jonas B; Vikne Harald; Mirtaheri Peyman

来源：Journal of Sports Medicine and Physical Fitness, 2016, 56(5): 616-623.

• Blood pressure
• Cardiac output
• Resistance training

BACKGROUND: The aim of this study was to compare the acute hemodynamic and cardiovascular responses of high load/low repetition resistance training (RT) to low load/high repetition RT.
METHODS: Thirteen healthy men performed four sets of 4 repetition maximum (RM) and 20RM leg-extensions without breath-holding. The RT was conducted in a randomized order and with 48 hours between bouts. Non-invasive beat-to-beat systolic and diastolic blood-pressure (SBP/DBP) was measured on the finger, while non-invasive cardiac output (CO) was assessed beat-to-beat by impedance-cardiography.
RESULTS: Mean +/- SD resting SBP/DBP and CO were 126 +/- 14/73 +/- 9 mmHg and 5.6 +/- 9 L min(-1), respectively. Exercise SBP/DBP values increased to 154 +/- 22/99 +/- 18 and 203 +/- 33/126 +/- 19 mmHg following 4RM and 20RM RT, respectively (compared to rest, all; P<0.001), and 20RM SBP/DBP values were higher than 4RM values (both, P<0.001). The SBP increased from the first to the fourth set of exercise following the 20RM load (P<0.01), but not so for the 4RM load. Exercise SBP/DBP values following the 4th rep of 20RM exercise (154 +/- 18/91 +/- 14), was similar to the 4RM values, but different to the 20th rep of the 20 RM loading (both; P<0.001). CO increased to 10.8 +/- 2.6 and 13.9 +/- 2.2 L min(-1), following 4RM and 20RM RT, respectively (compared to rest, both; P<0.001) and 20RM CO was higher than 4RM CO (P<0.01).
CONCLUSIONS: 2ORM RT resulted in higher blood-pressure than 4RM RT when performed to voluntary exhaustion. Differences in hemodynamic responses seems to be related to training duration and not to difference in loading.

• 出版日期2016-5