Effect of whey vs. soy protein supplementation on recovery kinetics following speed endurance training in competitive male soccer players: a randomized controlled trial

Kritikos, Savvas; Papanikolaou, Konstantinos; Draganidis, Dimitrios; Poulios, Athanasios; Georgakouli, Kalliopi; Tsimeas, Panagiotis; Tzatzakis, Theofanis; Batsilas, Dimitrios; Batrakoulis, Alexios; Deli, Chariklia K.; Chatzinikolaou, Athanasios; Mohr, Magni; Jamurtas, Athanasios Z.; Fatouros, Ioannis G.

doi:10.1186/s12970-021-00420-w

Journal of the International Society of Sports Nutrition

Table 3 Changes in performance indices

From: Effect of whey vs. soy protein supplementation on recovery kinetics following speed endurance training in competitive male soccer players: a randomized controlled trial

	Placebo			Whey			Soy
	Pre	Post-Load	24 h	Pre	Post-Load	24 h	Pre	Post-Load	24 h
CON-KE-DL (Nm)	258.4 ± 25.1	256.2 ± 25.8	220.8 ± 26.2^a	259.0 ± 33.4	256.3 ± 26.8	230.7 ± 32.4^b	255.8 ± 30.0	258.3 ± 23.0	227.3 ± 33.9^c
CON-KE-NDL (Nm)	257.8 ± 33.5	255.1 ± 33.1	221.6 ± 31.5^a	256.9 ± 28.7	258.7 ± 26.2	227.3 ± 31.1^b	257.8 ± 31.2	256.2 ± 24.7	229.4 ± 22.7^c
CON-KF-DL (Nm)	157.0 ± 22.8	156.4 ± 22.6	142.1 ± 22.0^a	158.2 ± 21.7	156.9 ± 23.5	144.0 ± 21.1^b	156.2 ± 23.9	155.4 ± 22.6	141.8 ± 22.4^c
CON-KF-NDL (Nm)	155.1 ± 23.2	155.9 ± 22.9	140.6 ± 26.2^a	156.7 ± 22.4	155.5 ± 23.8	142.4 ± 21.5^b	154.9 ± 22.8	154.0 ± 23.5	141.6 ± 22.1^c
ECC-KE-DL (Nm)	330.5 ± 73.5	333.9 ± 74.1	281.7 ± 81.6^a	332.6 ± 72.7	331.4 ± 72.9	289.9 ± 80.6^b	330.6 ± 72.6	332.8 ± 74	291.8 ± 65.4^c
ECC-KE-NDL (Nm)	329.2 ± 47.8	328.3 ± 48.0	284.9 ± 44.4^a	329.7 ± 53.8	328.6 ± 51.4	288.4 ± 54.5^b	328.9 ± 52.0	329.9 ± 48.8	289.2 ± 49.5^c
ECC-KF-DL (Nm)	193.3 ± 31.3	192.0 ± 32.0	154.1 ± 31.1^a	195.8 ± 24.4	197.4 ± 25.7	167.0 ± 28.9^b	196.5 ± 25.1	194.7 ± 20.0	164.8 ± 23.8^c
ECC-KF-NDL (Nm)	192.7 ± 18.7	193.5 ± 23.4	156.4 ± 27.8^a	194.2 ± 21.1	193.4 ± 26.2	168.2 ± 20.1^b	195.4 ± 22.1	194.0 ± 19.6	166.5 ± 26.3^c
10 m sprint time (sec)	1.908 ± 0.076	1.938 ± 0.099	2.020 ± 0.125^a	1.934 ± 0.068	1.942 ± 0.069	1.984 ± 0.090	1.896 ± 0.076	1.931 ± 0.081	1.951 ± 0.136
30 m sprint time (sec)	4.580 ± 0.140	4.565 ± 0.161	4.818 ± 0.147^a	4.587 ± 0.172	4.574 ± 0.179	4.735 ± 0.178^b	4.567 ± 0.150	4.591 ± 0.130	4.743 ± 0.145^c
RSA fatigue index (%)	6.39 ± 1.23	6.43 ± 1.16	7.65 ± 1.57^a	6.45 ± 1.07	6.43 ± 1.02	7.32 ± 1.27^b	6.41 ± 0.96	6.44 ± 0.73	7.43 ± 0.80^c
CMJ (cm)	47.1 ± 3.4	47.6 ± 4.3	43.8 ± 3.6^a	47.3 ± 3.1	47.0 ± 3.0	44.9 ± 2.5^b	46.9 ± 3.2	46.5 ± 3.0	44.3 ± 2.5^c

CON concentric, ECC eccentric, KE knee extensors, KF knee flexors, DL dominant limb, NDL non-dominant limb, RSA repeated sprint ability, CMJ countermovement jump. Note: Data are presented as means ± SD. ^a denotes a significant difference with pre in placebo at P < 0.05. ^b denotes a significant difference with pre in whey at P < 0.05. ^c denotes a significant difference with pre in soy at P < 0.05

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ISSN: 1550-2783

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