Hyperhomocysteinemia in winter elite athletes: a longitudinal study.

Hyperhomocysteinemia is a well-established risk factor for cardiovascular diseases. The aims of this study were to longitudinally investigate, in a group of elite athletes, plasma homocysteine levels and to search for relationships with the muscular workload and the vitamin status. One hundred and three athletes (59 males and 44 females, respectively) were evaluated in different periods: namely the recovery period, the training period, and the competition period; 84 subjects (37 males and 47 females), served as controls. The evaluation sessions consisted in blood sampling and medical examination. The percentages of athletes with normal and elevated homocysteine levels, defined by levels below or above the limit of 15 mumol/l, were 68.0% and 32.0%, respectively, in the recovery period, and these percentages remained unchanged during the following periods. In the control group, relevant percentages were 92.9% and 7.1%, respectively. The comparison between plasma homocysteine of male and female, evaluated in the recovery period, showed significantly higher levels in the former group (18.8+/-18.0 micromol/l vs 10.7+/-5.9 micromol/l, p<0.001 respectively), as well as a higher proportion of individuals with hyperhomocysteinemia (24/59 vs 9/44, p<0.05). The correlation analyses showed a weak but significant negative correlation between homocysteine and folate in the three periods considered, while no significant relationship was observed between homocysteine and creatine-kinase. We found excess prevalence of hyperhomocysteinemia in elite athletes of winter sports. A strategy to understand which mechanisms in these athletes subserve hyperhomocysteinemia is essential in order to reduce the potential risk for future cardio-vascular morbidity and mortality.

The role of the rehabilitation brace in restoring knee extension after anterior cruciate ligament reconstruction: a prospective controlled study.

To evaluate the effects of a rehabilitation brace locked in extension for the first week on the recovery of full extension after ACL reconstruction we compared two groups of subjects who underwent ACL bone-patellar tendon-bone reconstruction. The brace was unlocked twice a day for assisted physiotherapy. In Group A, 18 male subjects wore a post-operative brace locked from 0 degrees to 90 degrees. In Group B, 18 male subjects wore the same post-op brace locked in full extension for the first week. In both groups the brace was unlocked (0 degrees -120 degrees ) at the beginning of the second postoperative week, and then removed at the beginning of the third week. All the subjects followed the same rigorous, accelerated rehabilitation protocol. Each subject was evaluated pre and post-operatively (at second, fourth and eighth week) with bubble-level heel height difference (HHD) measurements and KT 1000 arthrometric assessment at the fourth postoperative month. Preoperative bubble-level HHD measurements of the two groups were statistically similar (Group A 0.6 cm, Group B 1 cm; not significant, n.s.). At the fourth week (Group A 2.2 cm, Group B 0.6 cm) and eighth week (Group A 1.6 cm, Group B 0.1 cm) follow-ups, bubble-level HHD measurements showed that the extension of the operated knees of Group B was significantly greater than in Group A. KT 1000 arthrometric scores showed no difference between the two groups (Group A 1.8 mm, Group B 1.5; n.s.).

Changes in hemoglobin values in elite cross-country skiers from 1987-1999.

Hemoglobin data have been available from ski teams beginning from 1987, and from 1989 to 1999 we have followed hemoglobin values in elite cross-country skiers in international competitions. The mean values at the 1989 World Nordic Ski Championships were lower than population reference values, as would be expected from plasma volume expansion associated with endurance training. However, an increase, particularly in the maximal values, became obvious in 1994 and rose further in 1996. These extreme values provide both a health risk to the individual athlete and unfair competition. After a rule limiting hemoglobin values was introduced, the drop of the highest values was remarkable: among men 15 g/l (0.23 mmol/l) and among women 42 g/l (0.65 mmol/l). It would appear that the rule had achieved its goal of limiting extreme hemoglobin values. Yet the mean hemoglobin concentrations in men and women have continued to rise, suggesting the continued use of artificial methods to increase total hemoglobin mass.

[Hallux valgus: results of the surgical management of hallux valgus]. / Alluce valgo: risultati del trattamento chirurgico dell'alluce valgo.

The Authors purpose to analyse on the basis of a critical examination of the operated hallux valgus with 2 different surgical technics the causes of failure and to give more exact indications about choosing the right surgical system.