Skip to main content

View full-text article in PMC

. 2023 Feb 17;11:e14878. doi: 10.7717/peerj.14878

Table 1. Dynamics of the chest muscles maximum strength development (1 RM) in bodybuilders of the examined groups during the study (IQR), n = 64.

Strength exercises	Groups	Term of observation, weeks				χ², df = 3 W
		Initial data	4	8	12
Barbell chest press (kg)	1	113.50 (23.25) U¹= 105.00 p = 0.39	120.50 (23.27)6.2%¹^,^*	127.00 (21.75)5.4%¹^,^*	131.00 (22.50)3.1%¹^,^* 15.4%²^,^***	χ² = 46.87^* W = 0.97^*
Barbell chest press (kg)	3	115.00 (20.00) U¹= 105.00 p = 0.39	124.25 (21.88)8.0%¹^,^*	132.00 (23.00)6.2%¹^,^*	137.50 (19.75)4.1%¹^,^* 19.5%²^,^***	χ² = 48.00^* W = 1.00^*
Smith machine bench press (kg)	2	111.00 (16.75) U²=124.00 p = 0.89	118.00 (17.75)6.3%¹^,^*	123.00 (16.12)4.2%¹^,^*	127.75 (16.87)3.8%¹^,^* 15.1%²^,^***	χ² = 48.00^* W = 1.00^*
Smith machine bench press (kg)	4	110.00 (4.37) U²= 124.00 p = 0.89	119.50 (5.37)8.6%¹^,^*	127.75 (5.87)6.9%¹^,^*	133.50 (3.00)4.5%¹^,^* 21.3%²^,^***	χ² = 48.00^* W = 1.00^*

Notes.

¹

difference (%) compared to previous results.

²

difference (%) in comparison with the initial data.

df: is the number of degrees of freedom
U¹: Mann-Whitney test (groups 1 and 3)
U²: Mann-Whitney test (groups 2 and 4)
χ²: Friedman’s test
W: is the Kendall’s coefficient of concordance

^*

p < .05.

^***

p < .001.