Table 1.

Characteristics of participants in 3 groups.

	30s × 1 time group	30s × 3 time group	30s × 10 time group	P value
Age (years)	20.7 ± 0.8	20.9 ± 0.5	21.4 ± 2.3	0.461
Height (m)	1.66 ± 0.10	1.65 ± 0.09	1.66 ± 0.07	0.912
Weight (kg)	59.3 ± 10.0	59.0 ± 9.3	55.1 ± 6.3	0.366
Male : Female	8 : 7	7 : 8	8 : 7

Data presented as mean ± standard deviation.