Table 4. Correlation between the rate of changes in plasma amino acid levels and changes in exercise capacity parameters after phase II cardiac rehabilitation.

∆	peak VO2	peak WR	AT	AT WR	VE vs. VCO2 slope	ΔVO2/WR
Gly	0.171	0.338	0.117	0.094	−0.061	0.149
Ala	0.228	0.068	0.591*	0.552	0.452	0.438
Ser	−0.117	0.267	−0.644	−0.581	−0.321	0.144
Thr	0.063	−0.155	0.434	0.308	0.46	0.617
Val	0.074	−0.109	−0.061	−0.066	0.041	0.182
Ile	−0.228	−0.022	−0.345	−0.42	−0.392	−0.205
Leu	−0.09	0.201	−0.512	−0.59	−0.357	0.012
Lys	0.086	0.018	−0.239	−0.329	0.427	0.121
Arg	0.224	0.306	−0.116	−0.103	0.368	0.226
His	−0.297	−0.277	0.113	−0.002	−0.065	−0.257
Phe	−0.293	0.036	−0.58	−0.53	−0.462	−0.364
Tyr	−0.067	−0.206	−0.077	0.074	−0.007	0.171
Trp	0.139	0.397	−0.557	−0.531	−0.144	0.175
Met	−0.039	0.018	−0.086	−0.135	−0.393	−0.173
Cys	0.279	0.182	−0.101	−0.105	−0.014	0.026
Pro	0.456	0.478	0.391	0.409	0.133	0.626*
Gln	−0.238	−0.008	−0.161	−0.145	0.021	0.046
Glu	0.163	0.323	0.007	0.096	−0.233	0.297
Asn	0.194	0.376	−0.265	−0.096	0.179	0.212
Cit	0.456	0.163	0.602*	0.681*	0.33	0.635*
Orn	−0.039	0.018	−0.086	−0.135	−0.393	−0.173
Tau	0.069	−0.105	−0.246	−0.092	0.565	−0.104

VO₂: oxygen uptake; WR: work rate; AT: anaerobic threshold; VE: minute ventilation; VCO₂: carbon dioxide output; Gly: glycine; Ala: alanine; Ser: serine; Thr: threonine; Val: valine; Ile: isoleucine; Leu: leucine; Lys: lysine; Arg: arginine; His: histidine; Tyr: tyrosine; Phe: phenylalanine; Trp: tryptophan; Met: methionine; Cys: cysteine; Pro: proline; Gln: glutamine; Glu: glutamic acid; Asn: asparagine acid; Cit: citrulline; Orn: ornithine; Tau: taurine. Correlation was evaluated using Spearman correlation coefficient. *p<0.05. Values are means ± SD, n=12