Hormonal

In breast cancer survivors specifically, physical activity is associated with significant improvements in insulin-like growth factor-I (IGF-I), fatigue, depression, and specific strength metrics (bench press, leg press).

For breast cancer survivors, regular physical activity may help lower insulin-like growth factor-I levels, which is a potential biomarker for cancer risk, while also reducing fatigue and depression. This supports the general recommendation for exercise but highlights specific hormonal benefits.