Journal of the International Society of Sports Nutrition

Table 5 Weekly and total training volumes

From: The effects of chronic betaine supplementation on body composition and performance in collegiate females: a double-blind, randomized, placebo controlled trial

Total Weekly Volume (kg)			Effect Size
Week 1	Betaine	15,617 ± 2873	NA
Week 1	Placebo	15,192 ± 3725	NA
Week 2 ^a	Betaine	25,259 ± 5494	2.94
Week 2 ^a	Placebo	26,540 ± 5513	3.46
Week 3 ^a	Betaine	29,165 ± 4193	0.72
Week 3 ^a	Placebo	28,415 ± 5772	0.35
Week 4 ^a,b,c	Betaine	34,229 ± 7774	1.02
Week 4 ^a,b,c	Placebo	29,062 ± 7296	0.13
Week 5 ^a,c,d	Betaine	26,919 ± 5402	−0.92
Week 5 ^a,c,d	Placebo	26,367 ± 5115	− 0.34
Week 6 ^a,d	Betaine	27,825 ± 5591	0.18
Week 6 ^a,d	Placebo	25,287 ± 7004	− 0.21
Week 7 ^a	Betaine	30,283 ± 6733	0.39
Week 7 ^a	Placebo	27,129 ± 7213	0.29
Week 8 ^a,b,c,e,f	Betaine	31,482 ± 4190	0.17
Week 8 ^a,b,c,e,f	Placebo	28,740 ± 5075	0.22
Total	Betaine	27,464 ± 4603	0.39^g
Total	Placebo	25,660 ± 4593

^asignificantly different than week 1
^bsignificantly different than week 2
^csignificantly different than week 3
^dsignificantly different than week 4
^esignificantly different than week 5
^fsignificantly different than week 6
^geffect size calculated as [(betaine – placebo) / pooled standard deviation]

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ISSN: 1550-2783

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