Sports Medicine - Open

Table 1 Mean values for age, BMI, and body fat % of recreational athletes submitted to short-term aerobic training programs

From: A Randomized Controlled Trial Investigating the Effects of Undulatory, Staggered, and Linear Load Manipulations in Aerobic Training on Oxygen Supply, Muscle Injury, and Metabolism in Male Recreational Runners

Variables.	Groups					p value
Variables.	Control (n = 16)	Und-Und (n = 18)	Und-Lin (n = 19)	Sta-Und (n = 17)	Sta-Lin (n = 18)	p value
Pre-training
Age	29.0 ± 0.7	27.7 ± 9.3	26.3 ± 6.5	26.6 ± 7.2	24.3 ± 4.0	0.86
Range (years)	28–30	20–35	21–35	20–35	22–32
CV (%)	2.41	35.02	24.71	27.07	16.46
BMI	26.0 ± 0.4	25.8 ± 4.6	25.8 ± 5.2	25.1 ± 3.0	25.9 ± 4.6	0.99
Range (kg/m²)	21.33–30.47	20.76–29.92	20.87–28.38	21.21–27.86	19.45–29.04
CV (%)	1.54	17.83	20.15	11.95	17.76
Body fat	15.3 ± 1.9	14.5 ± 5.8	11.1 ± 5.9	10.4 ± 4.3	13.1 ± 3.8	0.58
Range (%)	11.86–22.15	12.37–24.77	9.18–24.83	10,15–23.34	12.88–24.31
CV (%)	12.42	40	53.15	41.35	29.01
Post-training (8 weeks)
BMI	26.2 ± 0.7	24.9 ± 4.4 *	25.7 ± 5.3*	24.8 ± 3.0	25.8 ± 4.4 *	0.98
Range (kg/m²)	20.81–28,53	19.65–27.90	20.30–26.36	20.59–28.95	20.19–27.18
CV (%)	2.67	17.67	20.62	12.10	17.05
Δ (%)	0.66	− 8.70	− 0.32	− 0.87	− 0.12
d	0.35	0.05	0.02	0.10	0.02
body fat	16.5 ± 2.9	13.2 ± 6.3*	9.2 ± 5.0	8.6 ± 2.9	10.9 ± 6.3*	0.16
Range (%)	14.8–20.6	9.45–17.30	8.31–15.73	8.14–12.32	8.89–16.12
CV (%)	17.57	47.73	54.35	33.72	59.80
Δ (%)	7.85	− 8.78	− 17.58	− 17.08	− 16.45
d	0.47	0.21	0.36	0.49	0.33
p	0.17	0.04	0.06	0.09	0.03

BMI body mass index, Δ variation, d effect size. Values are indicated as mean ± standard deviation; * significant difference (p ≤ 0.05)

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