Plasma Zinc, Copper, Leptin, and Body Composition Are Associated in Elite Female Judo Athletes

Abstract

This study evaluated levels of plasma zinc, copper, and leptin, body composition, and their relationship in nine elite female judo athletes under two different training conditions. Body composition and biochemical measurements (hematological indexes, plasma zinc, plasma copper, and plasma leptin) were analyzed 24 h after intense training and following a 5-d period without training (no-training). Plasma leptin and plasma zinc increased with no-training. Plasma zinc correlated negatively with percent fat mass (r= -0.62; r=0.05) and positively with plasma leptin (r=0.83; p=0.002) in the no-training condition. Plasma copper did not change during the study and correlated positively with plasma leptin (r=0.66; p=0.05) and with percent fat mass (r=0.80; p=0.007) after training. Percent fat mass was associated negatively with plasma zinc (r=-0.62; p=0.05) in the no-training condition. Moreover, percent fat mass was negatively associated with the Zn/Cu plasma ratio under both training conditions (r< -0.78, p< 0.001). These results are consistent with the possible function of zinc as a lipid-mobilizing factor and of copper as a limiting factor in energy metabolism.

Time of physical exercise practice after injury in cervical spinal cord-injured men is related to the increase in insulin sensitivity

“…However, recent studies did not find correlation between serum leptin and fat mass in athletes of different modalities. [8][9][10] These authors suggest that the variation in energy intake is responsible for the lack of relationship between fat mass and the secretion of leptin in athletes. Data from these last studies partly corroborate our data from the PA group, as the individuals have SCI.…”

“…Some studies reported that the variation in leptin concentration during exercise was related to variation in fat mass. 5,7 However, more recent studies revealed that, regardless of body fat mass change, serum leptin levels are different in athletes 8,9 and in mice. 10 Previous investigations have shown the beneficial effects of physical training on insulin sensitivity in both healthy and glucose-intolerant subjects.…”

The effects of four weeks training on leptin levels in junior female judokas

“…But, low fat proportion may not always indicate low leptin level. This result can be seen in some studies (Koury et al, 2007). They showed that unaltered fat proportion values occurred in spite of low leptin levels after the training (Koury et al, 2007).…”

“…This result can be seen in some studies (Koury et al, 2007). They showed that unaltered fat proportion values occurred in spite of low leptin levels after the training (Koury et al, 2007). It is thought that exercise makes its effects on leptin through sympathetic adrenergic system (Torjman, 2001).…”

A study of single nucleotide polymorphism of leptin gene effect on serum copper, zinc and iron concentrations in Czech Pied bulls

“…However, Olusi et al (2003) recorded no significant relationship between zinc and leptin in healthy adult human. Koury et al (2007) reported that plasma leptin and trace elements were associated with exercising. Mantzoros et al (1998) concluded that Zn may influence serum leptin concentrations, possibly by increasing the production of IL-2 and TNF-α.…”