Dynamic work

The dynamic work ( movement work ) is a type of muscle work . Dynamic work is when the muscle alternates between contraction and relaxation.

The dynamic work can be divided into heavy and light dynamic work.

Light or one-sided dynamic work

The light or one-sided dynamic work consists when less than one seventh of the body muscle mass is in motion. Examples are typing or driving a car. The light dynamic work does not lead to fatigue of the circulatory system . But it can lead to an insufficient supply of the stressed muscles.

Heavy dynamic work or full body work

Heavy dynamic work, or full-body work, is when more than one seventh of the body's muscle mass is in motion. Walking or shoveling sand can be mentioned as examples. The heavy dynamic work, however, leads to fatigue of the cardiovascular system and the muscles involved. The continuous performance limit is considered exceeded if the heart rate increases disproportionately to the load. For untrained people, this limit is around a heart rate of 130 / min or a respiratory time volume of 30 l / min, a recovery time for the heart rate of less than 5 min, a recovery pulse sum below 100, a blood lactate concentration below 2 mmol / l and one of 50% . ${\displaystyle {\dot {V}}_{\mathrm {O} _{2}}}$ ${\displaystyle {\dot {V}}_{\mathrm {O} _{2}\mathrm {max} }}$

See also

• Static work

Individual evidence

1. ^ Robert F. Schmidth, Florian Lang, Manfred Heckmann: Physiologie des Menschen . 31st edition. Springer Berlin Heidelberg, Berlin / Heidelberg 2011, ISBN 978-3-642-01651-6 , pp. 872 .