1.
Walk-run training improves the anti-inflammation properties of high-density lipoprotein in patients with metabolic syndrome.
Sang, H, Yao, S, Zhang, L, Li, X, Yang, N, Zhao, J, Zhao, L, Si, Y, Zhang, Y, Lv, X, et al
The Journal of clinical endocrinology and metabolism. 2015;(3):870-9
Abstract
CONTEXT Metabolic syndrome (MetS) is a constellation of cardiovascular risk factors, including central obesity, dysglycemia, hypertension, and dyslipidemia. The anti-inflammatory properties of high density lipoprotein (HDL) can be compromised in MetS. Exercise is recognized as an important factor in the prevention and treatment of MetS. OBJECTIVE This study was designed to investigate whether walk/run training without any specific diet could enhance anti-inflammation capacity of HDL from MetS patients. DESIGN This was a case control study. SETTING The study was conducted in a Zhoudian community, Taian. PATIENTS Thirty nine patients with MetS were recruited and divided into a control group (n = 12) remaining in an untrained state and exercise group (n = 27) performing a 10-week walk/run training program. MAIN OUTCOME MEASURES The anti-inflammation capacities of HDL3 (HDL subfractions) from MetS patients with or without exercise were investigated by co-incubating with TNF- α-injured endothelial cells in vitro. RESULTS The training did not influence serum lipoprotein level in MetS patients and cholesterol efflux capacity of circulating HDL. However, walk/run training increased paraoxonase-1 (PON1) activity and decreased the levels of malondialdehyde in either serum or isolated HDL from MetS patients prominently. More importantly, HDL3 isolated from MetS patients with 10 weeks training protected endothelial cells against tumor necrosis factor-a (TNF-a) -induced injury, decreased monocyte chemotactic protein-1 levels in media and vascular cell adhesion molecule-1 expression markedly. Furthermore, HDL3 isolated from MetS patients with walk/run training inhibited the TNF-á-induced monocyte adhesion to endothelial cells and obviously increased nitric oxide production by activating endothelial nitric oxide synthase. CONCLUSION Walk/run training leads to a significant improvement in HDL anti-inflammation capacity in subjects with MetS without restricted diet, the mechanism underlying which at least partially is due to increased PON1 activity in HDL, NO production, and eNOS expression in endothelial cells.
2.
A brief review: the implications of iron supplementation for marathon runners on health and performance.
Zourdos, MC, Sanchez-Gonzalez, MA, Mahoney, SE
Journal of strength and conditioning research. 2015;(2):559-65
Abstract
The marathon is considered one of the most demanding endurance events, imposing an enormous amount of physiological stress on bodily structures, the metabolic machinery, and organ systems. Scientific evidence has conclusively shown that marathoners are in need of special nutritional strategies to maintain performance and health. Indeed, among competitive athletes, marathoners are at greater risk to develop anemia, bone mineral density loss, immunosuppression, and other clinical syndromes that may affect performance. Inadequate dietary intake of the micronutrient iron has been identified as one key factor in the development of the above mentioned anomalies. In fact, iron is one of the few nutrients recommended as a supplement by the American College of Sports Medicine (ACSM), the Academy of Nutrition and Dietetics (AND), and Dietitians of Canada. Therefore, the aim of this review article is to discuss the role of iron on the marathoner's health and performance. Special emphasis will be given to the physiological mechanisms accounting for the additional iron need in this group of athletes and the nutritional strategies intended to counteract iron deficiency.
3.
Effect of six weeks of sprint interval training on mood and perceived health in women at risk for metabolic syndrome.
Freese, EC, Acitelli, RM, Gist, NH, Cureton, KJ, Evans, EM, O'Connor, PJ
Journal of sport & exercise psychology. 2014;(6):610-8
Abstract
The purpose of this investigation was to determine whether 6 weeks of sprint interval training (SIT) is associated with changes in mood and perceived health in women at risk for developing metabolic syndrome (MetS). Physically inactive women (30-65 years) were randomized to 6 weeks of nutrition meetings and SIT (n = 23; 3 bouts/week of 4-8 30-s cycle sprints with 4-min recovery) or a nonexercise control condition (CON; n = 24). Before and after the 6-week intervention, perceived health status and mood were assessed. Clinically relevant increases in role-physical scores (ES = 0.64) and vitality (ES = 0.52) were found after 6 weeks of SIT compared with a nonexercise control group. For middle-aged women at risk for MetS, it is concluded that high-intensity, low-volume SIT (1) increases feelings of vitality and perceptions of having fewer physical limitations and (2) does not induce mood disturbances as occurs with high-volume, high-intensity training.
4.
[Secondary osteoporosis UPDATE. Stress fracture and bone metabolism marker in long distance runners].
Sakuraba, K
Clinical calcium. 2010;(5):718-27
Abstract
Stress fracture is one of the common injuries of over-use syndrome among long-distance runners. This injury is more common among women, often relating to anorexia, menstrual disorder and the lowering of bone density. An early diagnosis is considered to be of importance for a rapid recovery which leads to successful return to sporting performance. The bone metabolism marker, especially the bone absorption marker, often indicates a high density when the stress fracture is occurred. This could lead to early diagnosis and a new prognosis technique.