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At least 415 records · Page 23Linked to original sources
PubMed1991

Are high-performance young women athletes doomed to become low-performance old wives? A reconsideration of the increased risk of osteoporosis in amenorrheic women.

Osteoporosis and athletic amenorrhea are now well-established findings in top level women athletes. Specifically trabecular bone appears to be affected. Since these two phenomena seem to occur simultaneously, questions have been raised as to the underlying mechanisms and whether physical exercise, which had been proven to exert a positive beneficial effect under normal conditions, should be held responsible. Although hypo-estrogenic status, body composition, and nutritional deficiency have been offered as possible explanations, none of these can be solely regarded as completely satisfactory. As for athletic amenorrhea itself, low estrogens are probably secondary to other phenomena and may only be related indirectly to osteoporosis. Whether they interfere with nutritional uptake is obscure. Possibly, endogenous opioid peptides are involved as an unnegligible mediator. As an important practical consequence it should be pointed out that osteoporosis in women athletes will be only detected incidentally; a fact which could obstruct timely intervention, though whether therapy is necessary remains open to discussion. The discovery that amenorrheic athletes subject to more severe training have a higher bone density than less engaged amenorrheic colleagues, can only be in favor of physical exercise, even under these conditions.

Aging↗
PubMedDate not supplied

[Increasing mental performance by multistep oxygen therapy. Computer-assisted measurements of information processing capacity, intelligence, short-term memory and further parameters of cerebral performance].

Several basic characteristics of mental capacity were measured on 59 patients by means of computer-based-methods before and after oxygen multistep therapy (O2-MT) and compared with the results obtained from 14 volunteers serving as controls. Before and without O2-MT, an appreciable, age-dependent decline of the short-term memory capacity (general fluid intelligence) was found. O2-MT, completed by brain jogging, effected a significant increase in the presence duration by 0.4-0.7 secs, in the information flow by 1.4-1.9 bit/sec, resulting in an increase in the short-term memory capacity by 19-23% (in two experimental groups). The short-term memory itself was, however, not improved as compared to the controls. Moreover, the times needed for the accomplishment of perception, interference and reaction tests became significantly shorter by 12-18%. By using the screening test for cerebral insufficiency (CI), which is based on these parameters, the suspicion of CI could be excluded in 18 of 59 patients.

Adult↗