Effects of Specific Bioactive Collagen Peptides in Combination with Concurrent Training on Running Performance and Indicators of Endurance Capacity in Men: A Randomized Controlled Trial

Sports Medicine - Open

Table 4 Changes in time trial performance, lactate thresholds, body composition, before (Pre) and following (Post) supplementation with SCP (TG) or placebo (CG) in combination with CT

Variables	TG (n = 15)		CG (n = 17)		p value (mixed ANOVA)
Variables	PRE	POST	PRE	POST	T	G	T × G
Time trial (m)	10,963 ± 1254	12,690 ± 1223***	10,735 ± 1448	11,753 ± 1313***	≤ 0.001	n.s	≤ 0.05
V_LT (km h⁻¹)	9.17 ± 1.23	9.85 ± 0.82	9.48 ± 1.44	9.35 ± 0.98	n.s	n.s	≤ 0.05
V_IAT (km h⁻¹)	12.0 ± 1.19	13.7 ± 0.87***	12.2 ± 1.46	12.8 ± 0.85*	≤ 0.001	n.s	≤ 0.01
Lactate _LT (mmol l⁻¹)	1.85 ± 0.78	1.23 ± 0.40**	2.33 ± 1.38	1.54 ± 0.68**	≤ 0.001	n.s	n.s
Lactate _IAT (mmol l⁻¹)	3.37 ± 0.79	2.73 ± 0.40**	3.84 ± 1.38	3.04 ± 0.68**	≤ 0.001	n.s	n.s
Body weight (kg)	78.5 ± 9.2	77.0 ± 9.0*	75.6 ± 7.7	74.9 ± 7.5	≤ 0.01	n.s	n.s
FM (kg)	15.0 ± 4.0	13.3 ± 4.3**	13.5 ± 4.6	12.3 ± 4.6*	≤ 0.001	n.s	n.s
FFM (kg)	63.5 ± 7.3	63.7 ± 6.9	62.1 ± 4.8	62.6 ± 4.6	n.s	n.s	n.s
FM (%)	18.9 ± 4.2	17.2 ± 4.4**	17.5 ± 4.8	16.1 ± 5.0*	≤ 0.001	n.s	n.s
FFM (%)	81.1 ± 4.2	82.8 ± 4.5	82.5 ± 4.9	83.9 ± 5.1	≤ 0.001	n.s	n.s

TG Treatment group, CG Control group, V_LT Velocity at lactate threshold, V_IAT Velocity at individual anaerobic threshold, LT Lactate threshold, IAT Individual anaerobic threshold, HR Heart rate, FM Fat mass, FFM Fat free mass, T Main time effect, G Main group effect, T × G Time and group interaction effect
*p ≤ 0.05; **p ≤ 0.01. ***p ≤ 0.001 within the group from baseline to final examination