METABOLIC AND HEMODYNAMIC-CHANGES DURING ISOKINETIC MUSCLE TRAINING -A CONTROLLED CLINICAL-TRIAL

Twenty-one healthy males aged 20-36 years were examined for hemodynami c and metabolic parameters such as heart rate, oxygenation, lactate, b lood pressure, under isokinetic and ergometric loadings. The healthy v olunteers were tested by increased loads and constant times with an id entical isokinetic and ergometric power. The important results are: He art frequency and blood pressure are higher under isokinetic than unde r ergometric conditions. Oxygenation is equal in both tests. The lacta te values show for the isokinetic maximal and for the ergometric subma ximal loadings. The definitive factor for this variation is the relati on between force and velocity The higher tension of the muscles and th e higher activity of the fast-twitch fibers seem to be responsible for the increasing of sympathicotonia. The clinical impact of this contro lled study is: 1. Isokinetic testing might be dangerous for patients w ith cardiac diseases or circulatory disturbances. 2. Isokinetic traini ng programs have to pay attention to joint and internal diseases at th e same level. 3. During the first isokinetic test all precautions for a possible emergency case have to be taken.