The Effects of an Intensive 2-wk Resistance Training Period on Strength Performance and Nocturnal Heart Rate Variability
| Autor: | Esa Hynynen, Juha P. Ahtiainen, Piia Kaikkonen, Arto Hautala |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male medicine.medical_specialty Period (gene) Physical Therapy Sports Therapy and Rehabilitation Isometric exercise Nocturnal Autonomic Nervous System Young Adult 03 medical and health sciences 0302 clinical medicine Heart Rate Internal medicine Humans Medicine Heart rate variability Orthopedics and Sports Medicine Muscle Strength Training load Leg press business.industry Resistance training Resistance Training 030229 sport sciences Autonomic nervous system Physical Endurance Cardiology business 030217 neurology & neurosurgery |
| Zdroj: | International Journal of Sports Physiology and Performance. 15:1448-1454 |
| ISSN: | 1555-0273 1555-0265 |
| Popis: | Purpose: It is known that modifying the endurance-type training load of athletes may result in altered cardiac autonomic modulation that may be estimated with heart rate variability (HRV). However, the specific effects of intensive resistance-type training remain unclear. The main aim of this study was to find out whether an intensive 2-wk resistance training period affects the nocturnal HRV and strength performance of healthy participants. Methods: Young healthy men (N = 13, age 24 [2] y) performed 2-wk baseline training, 2-wk intensive training, and a 9-d tapering periods, with 2, 5, and 2 hypertrophic whole-body resistance exercise sessions per week, respectively. Maximal isometric and dynamic strength were tested at the end of these training periods. Nocturnal HRV was also analyzed at the end of these training periods. Results: As a main finding, the nocturnal root mean square of differences of successive R-R intervals decreased (P = .004; from 49 [18] to 43 [15] ms; 95% CI, 2.4–10.4; effect size = 0.97) during the 2-wk intensive resistance training period. In addition, maximal isometric strength improved slightly (P = .045; from 3933 [1362] to 4138 [1540] N; 95% CI, 5.4–404; effect size = 0.60). No changes were found in 1-repetition-maximum leg press or leg press repetitions at 80% 1-repetition maximum. Conclusions: The present data suggest that increased training load due to a short-term intensive resistance training period can be detected by nocturnal HRV. However, despite short-term accumulated physiological stress, a tendency of improvement in strength performance was detected. |
| Databáze: | OpenAIRE |
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