Effects of age on muscle energy metabolism and oxygenation in the forearm muscles

Article Abstract:

This study compares the oxygenation levels and energy metabolism rates in the forearms of young and older sedentary subjects during a hand gripping exercise task. There were no significant differences in muscle energy metabolism, but older individuals had reduced forearm muscle oxygenation, possibly due to peripheral circulation changes related to aging.

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Energy system contribution during 200- to 1500-meter running in highly trained athletes

Article Abstract:

This article investigates the relative contributions of the anaerobic and aerobic energy systems in trained runners during events ranging from 200 to 1500 meters. Results indicate that runners' accumulated oxygen deficit increased with event length up to 800 meters and that the aerobic energy system dominates after thirty seconds of running.

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Maximal accumuulated oxygen deficit must be calculated using 10-min time periods

Article Abstract:

A study of how different exercise durations influence the calculated accumulated O2 deficit is described. Results are that reducing the exercise duration used in the pretests to establish the relationships between power and O2 demand from 10 min may lead to a too low accumulated O2 deficit.

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