7 59.1 ± 0.7 pH a 7.09 ± 0.11 7.17 ± 0.12 7.12 ± 0.12 7.17 ± 0.12 lactate (mmol/l)

a 13.6 ± 1.3 14.5 ± 2.2 14.4 ± 2.8 14.2 ± 2.9 Bench press 1RM (kg) 87.5 ± 21.0 87.9 ± 20.9 82.5 ± 13.5 83.3 ± 14.6 Strength click here endurance (reps) 31 ± 3 32 ± 4 28 ± 2 31 ± 3 Full squat 1RM (kg) 120 ± 19 130 ± 24 131 ± 29 138 ± 16 Strength endurance (reps) 31 ± 8 47 ± 5 36 ± 10 38 ± 11 Data are means ± SDs. a pH is the lowest value and lactate is the highest value after 400 m DOMS and training alertness The HICA supplementation decreased significantly (p < 0.05) the whole body DOMS symptoms only in the 4th week of the treatment (1.4 ± 0.3) when compared to placebo (1.8 ± 0.2) (all weeks 1.5 ± 0.3 for HICA and 1.7 ± 0.4 for PLACEBO; mean ± SD). Training alertness was during every study

week slightly better in Verteporfin cell line the HICA group (3.6 ± 0.5; 4.2 ± 0.5; 4.1 ± 0.5; 4.3 ± 0.6) compared to the PLACEBO group (3.3 ± 0.6; 3.0 ± 0.9; 3.4 ± 1.1; 3.4 ± 0.8) but significantly (p < 0.05) better only BIBF 1120 clinical trial in the second week. Discussion Main results The 4-week supplementation with HICA increased the whole lean body mass of the soccer players. This increase (400 g) was emphasized in lower extremities. Also the subjects in the HICA group felt milder DOMS compared to the subjects in the PLACEBO group. There were no differences between the groups in any of the performance variables. Body composition The main result of this study was that lean body mass increased with HICA during the 4-week training period. Consequently, it is probable C-X-C chemokine receptor type 7 (CXCR-7) that skeletal muscle mass has increased especially in the lower extremities of the soccer players, because the main training

and playing is leg work. The precision of DXA for lean body mass is 1.11% as we mentioned in the methods. The result in lower extremity change was small – in the HICA group there was a mean increase of 400 g (~2%) and in PLACEBO a decrease of 150 g (< 1%). Taking into account this short duration of the experiment period the difference between the groups can be considered rather clear (550 g). Looking also at the individual mass changes we can see a clear difference between the groups. Only one subject from each group is within another group. Human skeletal muscle protein metabolism has received significant attention over the past few decades because of its relevance to sport, physical inactivity, aging, and disease processes [30]. The importance of skeletal muscle is obvious since it comprises about 40% of body weight, constitutes between 50 and 75% of all proteins [31], and is important for locomotion. However, it is also important as an amino acid reservoir, for energy consumption and for fuels for other tissues (e.g., brain, immune cells). Skeletal muscle proteins have regular turnover such that 1 – 2% of proteins are synthesized and broken down daily [32]. The turnover of proteins involves the ongoing processes of protein synthesis and breakdown.