Interaction between Overtraining and the Interindividual Variability May (Not) Trigger Muscle Oxidative Stress and Cardiomyocyte Apoptosis in Rats

Table 3

Heart morphometric analysis.

		CO	FOR	NFOR
Cellular area	(μm^2)	184.30 ± 70.72	220.85 ± 59.39*	204.04 ± 55.64*
Collagen	(%)	1.43 ± 1.16	1.56 ± 1.42	1.38 ± 1.49
Heart mass	(mg)	1196.70 ± 140.57	1198.43 ± 105.89	1203.18 ± 111.60
Body mass	(g)	416.20 ± 41.14	366.89 ± 24.12*	370.29 ± 33.03*
Heart/body mass	(mg/g)	2.88 ± 0.22	3.27 ± 0.27*	3.25 ± 0.17*

Cellular area and collagen from the left ventricle: CO, FOR and NFOR (𝑛=3). A total of 30 cells (cellular area) and 30 fields (collagen) per animal were quantified, for a total of 90 cells and 90 fields per group. Heart mass and body mass: CO (𝑛=9), FOR (𝑛=11), NFOR (𝑛=8). *Significantly different from CO (𝑃<0.05). Mean ± SD.