Effects of training on postexercise limb muscle EMG synchronous to respiration

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Abstract
University students (10 trained and 10 untrained) participated in 60 sessions testing the effect of training on postexercise electromyogram synchronous to respiration. The latter was recorded for m. [musculus] biceps brachii dextra, m. quadriceps femoris dextra and m. gastrocnemius dextra. The respiration rate was taken before and after 3 levels of functional effort performed on a bicycle ergometer. The first (2 .times. 30 s with a 20-s interval at 100 rpm and 245 W [work]) and the second (5 .times. 1 min with a 30-s interval after each min, at 90 rpm and 200 W) were of speed-developing nature; the third (20 min at 60 rpm and 117 W with 1-min interval every 5 min) was to develop endurance. The greatest percentage of a synchronous-to-respiration muscle bioelectric activity was observed after the first 2 types of effort. In the 3rd type the percentage was smaller and the activity duration was shorter. The percentage of biopotential occurrence was greater for untrained persons, with a considerably longer disappearance time. The phenomenon can be used as a criterion in the athlete''s functional diagnosis.

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