Effects of physical training on metabolism of connective tissues in young mice.

The effects of physical training on the metabolism of collagen, calcium and glycosaminoglycans in various connective tissues were studied in male NMRI mice. The mice to be trained and their controls were about 3 weeks old (expt. I) and 8 weeks old (expt.

Physical training and connective tissues in young mice: biochemistry of long bones.

The effect of physical training on collagen, ground substance, and nucleic acid concentrations in long bones was studied in male mice of NMRI strain. The mice to be trained and their controls were about 2 wk old at the beginning of training, which took place on a 5 degrees inclined treadmill 5 days/wk for 3-22 wk. The duration of daily exercise was increased progressively over 3 wk.

Effects of "lifelong" physical training on functional aging in men.

Functional aging was examined in a cross-sectional study of 22 habitually trained and 22 sedentary men (aged 34 to 70 and 33 to 68, respectively) by using various physiological, psychophysiological, and anthropometric measurements. Compared to the control group, the trained subjects had significantly higher maximal oxygen uptake, vertical velocity, maximal breathing capacity, percentage of slow twitch muscle fibers, and muscle isocitrate dehydrogenase activity, in addition to lower values in body weight, systolic as well as diastolic blood pressure, patellar reflex time, serum triglycerides, and fast twitch muscle fibers (particularly glycolytic fibers). The results showed that the effects of endurance training are largely limited to functions which are apparently relevant to physical performance.

Physical training and connective tissues in young mice. Biochemistry of skin.

The effect of physical training on some connective tissue components of the skin was studied in male mice of NMRI-strain. The mice to be trained and their controls were about 2-weeks-old at the beginning of the training, which took place on a 5 degree inclined treadmill 5 days a week for 3-22 weeks progressively. The final exercise bouts were 50 and 80 min for moderate programmes and 180 min for the intensive programme at a speed of 30 cm/s.

Physical training and connective tissues in young mice-heart.

The effect of physical training on the chemical properties of the heart tissues was studied in male mice of NMRI-strain. The mice to be trained and their controls were about 2 weeks old at the beginning of the training, which took place on 5 degrees inclined treadmill 5 days a week for 3-22 weeks. The duration of daily exercise was progressively increased over the first 3 weeks.

Blood circulation of long bones in trained growing rats and mice.

The effect of physical training on the blood circulation of long bones was studied in growing rats and mice of NMRI-strain. The animals to be trained and their controls were about 2 weeks old at the beginning of the training. The training took place on a 5 degree inclined treadmill 5 days a week for 3 weeks in experiment I and 7 weeks in experiments II and III.