In a double-blind controlled trial, 53 elderly men (age: 72.2 ± 4.7 years) completed a 12-week resistance training intervention in combination with supplementation with 15 g of collagen or a placebo, resulting in significantly higher gains in fat-free mass (FFM) and muscle strength in the collagen peptide group. was, to the best of our knowledge, the first study to find a positive effect of collagen supplementation on strength and body composition. The beneficial effects of collagen supplementation on passive structures are associated with higher muscle strength following an improvement in force transmission. reported a faster recovery from jumping exercise and a tendency to reduce muscle soreness after collagen supplementation. Studies have reported less joint pain perception after collagen peptide supplementation in healthy active participants and in patients with osteoarthritis, which could be of interest for those involved in elite sport. The benefit of collagen supplementation on collagen synthesis regarding tendon architecture has been demonstrated by various studies through the analysis of injured participants. Thus, to ensure muscle fiber strength transmission, the ECM structures need to adapt in response to resistance training. It is an important element of the extracellular matrix (ECM) of skeletal muscle and tendons and is mainly responsible for their functionality in terms of force transmission, flexibility, and adaptation. Collagen is the most represented protein in the human body (30% of the protein concentration). showed that the synthesis of collagen in fibroblasts behaves similarly to MPS after a single bout of resistance training. īesides the contractile muscle components, passive tissues like bone, cartilage, ligaments, and tendons also adapt to resistance training. Leucine, a branched-chain amino acid (BCAA), has been shown to be a prerequisite stimulator of the mammalian target of rapamycin (mTOR) signaling pathway, which plays a critical role in MPS. Amino acids are required for protein synthesis. The underlying mechanism of adaptation is an increase in muscle protein synthesis (MPS) stimulated through mechanical load, which can be further augmented by additive protein supplementation. In particular, resistance training using a repeated high-weight stimulus optimizes the preservation of muscle mass that is correlated with body strength. Maintenance of muscle mass is not only important for athletes, but also for health and aging. Skeletal muscle is a dynamic tissue that adapts to external conditions and reacts to acute and long-term physical activity and feeding conditions. More proteins were upregulated in the COL intervention most of which were associated with contractile fibers. In conclusion, the use of RET in combination with collagen peptide supplementation results in a more pronounced increase in BM, FFM, and muscle strength than RET alone. In contrast to PLA, the upregulated proteins in COL were mostly associated with the protein metabolism of the contractile fibers. In contrast, only 44 proteins were of higher abundance in PLA. In COL, 221 higher abundant proteins were identified. Both groups improved in strength levels, with a slightly higher increase in COL compared with PLA. BM and FFM increased significantly in COL compared with PLA, whereas no differences in FM were detected between the two groups. Muscle proteome analysis was performed by liquid chromatography tandem mass spectrometry (LC-MS/MS). A full-body hypertrophy workout was completed three times per week and included four exercises using barbells. In a double-blind, randomized design, subjects consumed either 15 g of specific collagen peptides (COL) or a non-caloric placebo (PLA) every day within 60 min after their training session. Twenty-five young men (age: 24.2 ± 2.6 years, body mass (BM): 79.6 ± 5.6 kg, height: 185.0 ± 5.0 cm, fat mass (FM): 11.5% ± 3.4%) completed body composition and strength measurements and vastus lateralis biopsies were taken before and after a 12-week training intervention. The aim of this study was to investigate whether collagen peptide supplementation in combination with RET influences the protein composition of skeletal muscle. Studies have demonstrated that collagen peptides containing mostly non-essential amino acids increase fat-free mass (FFM) and strength in sarcopenic men. Evidence has shown that protein supplementation following resistance exercise training (RET) helps to further enhance muscle mass and strength.
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