One Velocity Loss Threshold Does Not Fit All: Consideration of Sex, Training Status, History, and Personality Traits When Monitoring and Controlling Fatigue During Resistance Training

Sports Medicine - Open

Table 2 Factors affecting whether participants: (1) reached the same velocity loss threshold in two consecutive days; (2) performed multiple repetitions within a single velocity loss threshold; (3) were able to experience 50% velocity loss within a training set

Predictors	Reaching the same velocity loss threshold on both days			Multiple repetitions within a single velocity loss threshold			Experiencing 50% velocity loss within a set
	Statistics			Statistics			Statistics
	Odds ratios	CI	p	Odds ratios	CI	p	Odds ratios	CI	p
(Intercept)	0.66	0.11–3.83	0.645	0.09	0.03–0.31	< 0.001	0.24	0.00–59.06	0.609
Sex [male]	1.16	0.69–1.95	0.582	0.45	0.31–0.66	< 0.001	0.52	0.09–3.10	0.477
Load [80% 1RM]	2.43	1.82–3.24	< 0.001	0.42	0.33–0.54	< 0.001	0.55	0.15–1.94	0.351
Load [90% 1RM]	8.10	5.44–12.07	< 0.001	0.10	0.07–0.16	< 0.001	0.03	0.01–0.19	< 0.001
Emotional stability	1.00	0.97–1.02	0.751	1.04	1.02–1.06	< 0.001	1.17	1.02–1.34	0.029
Conscientiousness	1.00	0.97–1.03	0.971	1.00	0.98–1.02	0.794	0.99	0.87–1.13	0.900
Training experience [> 3 years]	0.85	0.57–1.28	0.449	0.82	0.61–1.09	0.168	–	–	–
Repetition practices [8–12]	0.93	0.59–1.47	0.753	0.94	0.68–1.31	0.736	–	–	–
Repetition practices [> 12]	1.14	0.69–1.89	0.604	1.78	1.25–2.55	0.002	–	–	–
Relative strength (1RM/BM)	1.30	0.73–2.33	0.376	2.23	1.47–3.40	< 0.001	–	–	–
Load practices [70–80% 1RM]	0.94	0.56–1.59	0.824	0.81	0.56–1.18	0.273	–	–	–
Load practices [> 80% 1RM]	0.78	0.43–1.40	0.401	1.38	0.91–2.10	0.129	–	–	–
Repetitions in reserve practices [> 2 RIR]	0.93	0.62–1.40	0.734	1.67	1.25–2.23	0.001	0.28	0.05–1.69	0.165
Random effects
σ²	3.29			3.29			3.29
τ₀₀ _ID	0.12			0.00			3.93
τ₀₀ _VL	0.38			0.19			–
ICC	0.13			0.05			0.54
N _VL	13			13			–
N _ID	46			46			46
Observations	1121			1593			138
Marginal R²/Conditional R²	0.155/0.267			0.199/0.242			0.333/0.696

Reference groups were the following: Load [70% 1RM], Sex [female], Training experience [< 3 years], Loads practices [< 70% 1RM], Repetitions practices [< 8], Repetitions in reserve practices [< 2 RIR]
1RM one repetition maximum, BM body mass, RIR repetitions in reserve, ICC interclass-correlation coefficient, R² pseudo coefficient of determination, CI 95% confidence intervals, p p value