The performance and aerobic endurance effects of high-intensity versus moderate-intensity continuous running
| Autor: | Asgeir Mamen, Even Jarstad |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Materials science Physiology Endocrinology Diabetes and Metabolism 030204 cardiovascular system & hematology Athletic Performance Running 03 medical and health sciences Young Adult 0302 clinical medicine Animal science Oxygen Consumption Physiology (medical) Aerobic exercise Humans Exercise Nutrition and Dietetics High intensity 030229 sport sciences General Medicine Intensity (physics) Athletes Exercise Test Physical Endurance Female |
| Zdroj: | Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme. 44(9) |
| ISSN: | 1715-5320 |
| Popis: | The aim of the present study was to investigate the performance and aerobic endurance effects of high-intensity (HICR) versus moderate-intensity continuous running (MICR), which were nonmatched for total work. Twenty healthy recreational athletes (aged 28 ± 5 years) were randomly assigned to an HICR, MICR, or no-intervention control (C) group. The HICR group (n = 7) performed a 20-min strenuous, almost exhausting, run above lactate threshold (LT) at ∼88% of maximal heart rate (HRmax), whereas the MICR group (n = 7) performed a 40-min run at ∼80% HRmax. Both the HICR and MICR groups performed 3 intervention sessions a week, in addition to ∼60% of their regular aerobic exercise, for 10 weeks. The C group (n = 6) performed regular physical exercise throughout the study. Time to exhaustion, during a ∼4–8-min ramp test procedure, was significantly increased by 23% and 24% (P < 0.01) following HICR or MICR, respectively, with no significant difference in the change in time to exhaustion (P = 1.00) at pre- to post-training between the 2 training modalities (HICR and MICR). In the HICR group, maximal oxygen consumption and velocity at LT increased significantly by 5.0% and 6.8% (P < 0.01), respectively. The MICR group increased relative maximal oxygen consumption (mL·kg−1·min−1) significantly by 4.7% (P < 0.05), whereas the pulmonary respiratory gas-exchange ratio was significantly decreased at a submaximal workload by 4.2% (P < 0.01), indicating enhanced fat oxidation. No performance or physiological effects were observed in the C group. The present study indicates that even with a substantially lower total energy turnover, HICR can be as performance enhancing as MICR. Moreover, HICR can increase maximal aerobic power, whereas MICR may enhance fat oxidation. |
| Databáze: | OpenAIRE |
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