Table 7

Effect of recreational football on lean body mass and fat mass with modifying effects for type of control group, gender, age, length of training intervention and training frequency

	Lean body mass (kg)			Fat mass (kg)
	Effect size (95% CI)	±95% CL	Magnitude-based inference	Effect size (95% CI)	±95% CL	Magnitude-based inference
Type of control
No exercises	0.51 (0.03 to 0.99)	0.48	Possibly moderately beneficial	1.72 (0.86 to 2.58)	0.56	Most likely largely beneficial
Running group	0.20 (−0.40 to 0.79)	0.33	Very unlikely small harmful	−0.41 (−1.24 to 0.42)	0.87	Possibly small harmful
Zumba group	0.05 (−2.30 to 2.39)	2.50	Unclear	0.35 (−1.54 to 2.24)	2.00	Unclear
Gender
Male	0.12 (−0.48 to 0.71)	0.63	Very unlikely trivially harmful	1.33 (0.61 to 2.04)	1.90	Very likely largely beneficial
Female	0.59 (0.16 to 1.02)	0.40	Possibly small beneficial	0.74 (−0.17 to 1.65)	0.93	Possibly moderately beneficial
Age (years)
18–45	0.56 (0.11 to 1.00)	0.43	Possibly small beneficial	0.68 (−0.31 to 1.67)	1.00	Possibly moderately beneficial
45–65	0.28 (−0.73 to 1.29)	1.10	Unclear	1.63 (1.00 to 2.27)	0.66	Most likely largely beneficial
>65	0.20 (−0.73 to 1.13)	0.99	Unlikely small beneficial	0.58 (−0.56 to 1.72)	0.23	Unclear
Length of training intervention
≤12 weeks	−0.02 (−1.31 to 1.28)	1.30	Unlikely trivially harmful	1.45 (0.41 to 2.49)	0.97	Very likely largely beneficial
>12 weeks	0.46 (0.10 to 0.82)	0.35	Unlikely small beneficial	0.88 (0.16 to 1.59)	0.69	Likely moderately beneficial
Training frequency
≤2 weeks	0.46 (0.08 to 0.84)	0.37	Unlikely small beneficial	−0.32 (−0.86 to 0.21)	0.19	Unlikely small harmful
>2 weeks	0.43 (0.08 to 0.77)	0.17	Unlikely small beneficial	1.65 (0.85 to 2.68)	0.66	Most likely largely beneficial

95%CI, Confidence interval at 95%; ±95%CL, Confidence limit at 95%.