Systemic Responses Towards Oxy-Inflammation, Hormones, and Mood in Breast Cancer Survivors: Preliminary Evidences from Dragon Boat Endurance Race.

Background/Objectives: Endurance exercise increases oxygen demand and, when not balanced by antioxidant defenses, consequently, oxidative stress and inflammatory cytokines increase too. In breast cancer survivors (BCS), post-treatment, physical capacity decreases, lowering life quality. Dragon boat (DB) paddling has shown benefits in reducing lymphedema and improving psychological well-being. This study aimed at non-invasively investigating in BCS, by means of saliva and urine samples, the systemic responses to oxy-inflammation, and appetite hormones after a DB endurance race. Methods: 15 BCS and 15 healthy women (5 (CTR) who performed the DB race too) were studied. BCS and CTR were monitored pre- and post-race. Reactive oxygen species (ROS) production, total antioxidant capacity (TAC), lipid peroxidation (8-iso), DNA oxidation (8-OH-dG), nitric oxide metabolites (NOx), inflammation markers (IL-6-10 and TNFα), appetite hormones, electrolytes concentration, psychometric, and physical scales were assessed. Results: At rest, compared to healthy women, BCS showed a significant increase in oxy-inflammation biomarkers. BCS showed a general increase in oxy-inflammation parameters compared to CTR after the DB race. In BCS, there were the following results: ROS: +80%; lipid peroxidation: +103%; DNA oxidation: +44%; interleukins-6: +179%; IL-10: +55%; TNFα: +9%, NOx: +60% increases and unbalanced appetite hormones: leptin (-32%); and ghrelin (+53%). Moreover, the dragon boat offered a holistic approach to recovery, addressing emotional and social needs supporting belonging, love, and esteem needs, reported to be about 56% of the motivations in this activity, while post-race the following increased: a sense of fatigue (+55%); tiredness (48%); a cold sensation (+15%); and +32% pain. Conclusions: This study provided evidence that, in BCS, a DB endurance race produces an important imbalance in the oxy-inflammation state, at the same time being accompanied by a positive impact on subjective mood and general wellness. Future studies should focus on long-term effects.