[Age dependent dynamics of the critical points of physical exercise in healthy men].

Age dynamics of the critical points of an exercise in 240 apparently healthy men aged 18-95 years was investigated. It is shown that linear decrease of a level of critical load capacity, maximum oxygen consumption, thresholds of anaerobic exchange and decompensated metabolic acidosis takes place in aged individuals. The equations of linear regression of changes in these parameters with age are presented.

[The characteristics of energy substrate utilization during long-term physical loading in elderly men].

Healthy young and elderly men were examined with the aim to study age peculiarities of energy provision during physical load (PhL). Changes in concentration of glucose and free fatty acids (FFA) under PhL of various intensity and duration was analyzed. It is found out that the load with force corresponding to the anaerobic threshold (AT) level of young people causes a marked drop of glucose concentration in blood accompanied by development of subjective fatigue feeling, which led to loading termination in elderly people.

[Dynamics of cardiac rhythm in the transitional period during controlled physical exercises in persons of various ages].

The transitional cardiac rhythm processes of work-in and recovery under standard dynamic loads of 25 and 50 W were studied in 90 healthy people aged 20-89 and in 15 elderly people being trained for endurance. The rhythmographic method was used for that purpose. Duration of the transitional processes (work-in and recovery) was revealed to considerably increase with age, while the cardiac rhythm increment--to decrease within the first 10 seconds of the work-in period.