Table 1.

Characteristics of participants and interventions in the studies included in the review.

Level of Participants	Active	1 Study [18]
	Regularly trained athletes	4 Studies [13,26,29,30]
	No Regular Training before the Study	1 Study [19]
Age Range (years)	20–35 years	5 Studies [13,19,26,29,30]
	Not Specified	1 Study [18]
Se Plasma Level (µg/l)	Assayed	4 Studies [13,19,26,30]
	Not Assayed	2 Studies [18,29]
Type of Administration of Selenium	Organic selenium in form of selenomethionine	4 Studies [13,26,29,30]
	Salts of sodium selenite (Na2Se03)	2 Studies [18,19]
Dosage Used	180 µg single dose	3 Studies [13,26,29]
	200 µg single dose	2 Studies [18,19]
	240 µg single dose	1 Study [30]
Moment of Supplementation	Daily	6 Studies [13,18,19,26,29,30]
Duration of Treatment	4 weeks	1 Study [18]
	10 weeks	4 Studies [13,26,29,30]
	14 weeks	1 Study [19]