Multiarticular isokinetic high-load eccentric training induces large increases in eccentric and concentric strength and jumping performance.

This study investigated the effects of short-term eccentric exercise training using a custom-made isokinetic leg press device, on concentric and eccentric strength and explosiveness as well as jumping performance. Nineteen healthy males were divided into an eccentric (ECC, n = 10) and a control group (CG, n = 9). The ECC group trained twice per week for 8 weeks using an isokinetic hydraulic leg press machine against progressively increasing resistance ranging from 70 to 90% of maximal eccentric force.

Exercise as a model to study redox homeostasis in blood: the effect of protocol and sampling point.

Twenty males ran either on a level treadmill (nonmuscle-damaging condition) or on a downhill treadmill (muscle-damaging condition). Blood and urine samples were collected before and after exercise (immediately after, 1h, 4h, 24h, 48h, and 96h). The following assays were performed: F(2)-isoprostanes in urine, protein carbonyls in plasma, glutathione, superoxide dismutase, glutathione peroxidase, and catalase in erythrocytes.

The influence of exercise on musculoskeletal disorders of the lumbar spine.

Aim: This review, through a survey of the relevant research, examines the role of exercise in the natural course of symptoms in the preventive category, as well as in acute, subacute, chronic and postoperative categories of low back pain. The purpose of this study was to examine the evidence for cause and effect relationships between exercise and acute, subacute, and chronic low back pain, as well as for any dose-response relations involved.

Methods: Computer database research and personal retrieval systems were used to locate the relevant literature.

A study of the effects on the ovarian cycle of athletic training in different sports.

Aim: The purpose of this research was to investigate the effects of sports training on the ovarian cycle of athletes of various disciplines, and of non-athletes, their participation and their performance in competition as well as the appearance of symptoms of discomfort pre and during the duration of menstruation.

Methods: Athletes from the disciplines of basketball, track athletics, gymnastics, swimming, synchronized swimming and water polo as well as non-athletes took part in this research. All the participants, both athletes and non-athletes were selected and completed a specially designed questionnaire.