Active recovery shows favorable IGF-I and IGF binding protein responses following heavy resistance exercise compared to passive recovery
| Autor: | Heikki Kyröläinen, Bradley C. Nindl, Juha P. Ahtiainen, Keijo Häkkinen, Sheila S. Gagnon, Ritva S. Taipale |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male 0301 basic medicine medicine.medical_specialty Endocrinology Diabetes and Metabolism Passive recovery 030209 endocrinology & metabolism Isometric exercise 03 medical and health sciences 0302 clinical medicine Endocrinology Internal medicine medicine Humans Insulin-Like Growth Factor I Leg press Morning business.industry Binding protein Resistance training Resistance Training Recovery of Function Insulin-Like Growth Factor Binding Proteins 030104 developmental biology Female business |
| Zdroj: | Growth Hormone & IGF Research. :45-52 |
| ISSN: | 1096-6374 |
| DOI: | 10.1016/j.ghir.2019.09.001 |
| Popis: | IGF-I and IGFBPs have important physiological modulatory effects and this study sought to examine the influence of active vs. passive recovery following a heavy resistance exercise on IGF-I and IGF binding protein (IGFBP) recovery responses. It was hypothesized that increased IGF-I and decreased inhibitory IGFBPs during active recovery may be reflective of cascades promoting physiological recovery. 18 untrained men ((AR n = 7, PR n = 11), age: 26 ± 4 years, height: 174 ± 8 cm, body mass: 75 ± 13 kg) performed either a protocol-specific 10 × 10 × 30% 1RM active (AR) or passive recovery (PR) session following a heavy resistance exercise session performed on a leg press device (10 × 10 1RM). Maximal isometric force production (MVC) and IGF- and IGFBPs were measured pre, post, 1-hr post, and next morning. A significantly greater relative response in IGF-I was observed in AR than in PR at post recovery and next morning (p .01 and statistical trend, respectively) while absolute concentrations of IGFBP-1 at next morning were significantly higher in PR than AR (p .05), and relative IGFBP-1 response from control to next morning in PR was significantly greater than in AR (p .001). IGFBP-1 may be inhibitory to IGF-I biological action, thus the lower concentration of IGFBP-1 after AR may be considered favorable in terms of recovery due to its positive relationship with glucose metabolism and maintaining metabolic homeostasis. These results suggest that some of the benefits of an active recovery bout may be mediated by favorable IGF-I system responses (increased IGF-I and decreased IGFBP-1) in the hormonal milieu that may assist facilitating the cascade of physiological recovery processes following acute heavy resistance loading exercise. |
| Databáze: | OpenAIRE |
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