Universität zu Köln

Frett, Timo ORCID: 0000-0002-5572-1177, Lecheler, Leopold, Speer, Martin, Marcos, David, Pesta, Dominik, Tegtbur, Uwe, Schmitz, Marie-Therese ORCID: 0000-0003-1351-9381, Jordan, Jens and Green, David Andrew (2022). Comparison of trunk muscle exercises in supine position during short arm centrifugation with 1 g at centre of mass and upright in 1 g. Front. Physiol., 13. LAUSANNE: FRONTIERS MEDIA SA. ISSN 1664-042X

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Abstract

Spaceflight is associated with reduced antigravitational muscle activity, which results in trunk muscle atrophy and may contribute to post-flight postural and spinal instability. Exercise in artificial gravity (AG) performed via short-arm human centrifugation (SAHC) is a promising multi-organ countermeasure, especially to mitigate microgravity-induced postural muscle atrophy. Here, we compared trunk muscular activity (mm. rectus abdominis, ext. obliques and multifidi), cardiovascular response and tolerability of trunk muscle exercises performed during centrifugation with 1 g at individual center of mass on a SAHC against standard upright exercising. We recorded heart rate, blood pressure, surface trunk muscle activity, motion sickness and rating of perceived exertion (BORG) of 12 participants (8 male/4 female, 34 +/- 7 years, 178.4 +/- 8.2 cm, 72.1 +/- 9.6 kg). Heart rate was significantly increased (p < 0.001) during exercises without differences in conditions. Systolic blood pressure was higher (p < 0.001) during centrifugation with a delayed rise during exercises in upright condition. Diastolic blood pressure was lower in upright (p = 0.018) compared to counter-clockwise but not to clockwise centrifugation. Target muscle activation were comparable between conditions, although activity of multifidi was lower (clockwise: p = 0.003, counter-clockwise: p < 0.001) and rectus abdominis were higher (clockwise: p = 0.0023, counter-clockwise: < 0.001) during centrifugation in one exercise type. No sessions were terminated, BORG scoring reflected a relevant training intensity and no significant increase in motion sickness was reported during centrifugation. Thus, exercising trunk muscles during centrifugation generates comparable targeted muscular and heart rate response and appears to be well tolerated. Differences in blood pressure were relatively minor and not indicative of haemodynamic challenge. SAHC-based muscle training is a candidate to reduce microgravity-induced inter-vertebral disc pathology and trunk muscle atrophy. However, further optimization is required prior to performance of a training study for individuals with trunk muscle atrophy/dysfunction.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Frett, Timo UNSPECIFIED orcid.org/0000-0002-5572-1177 UNSPECIFIED Lecheler, Leopold UNSPECIFIED UNSPECIFIED UNSPECIFIED Speer, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Marcos, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Pesta, Dominik UNSPECIFIED UNSPECIFIED UNSPECIFIED Tegtbur, Uwe UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmitz, Marie-Therese UNSPECIFIED orcid.org/0000-0003-1351-9381 UNSPECIFIED Jordan, Jens UNSPECIFIED UNSPECIFIED UNSPECIFIED Green, David Andrew UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-691343
DOI:	10.3389/fphys.2022.955312
Journal or Publication Title:	Front. Physiol.
Volume:	13
Date:	2022
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	1664-042X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LOADING COUNTERMEASURE SKINSUIT; INTERNATIONAL-SPACE-STATION; BODY NEGATIVE-PRESSURE; HUMAN SKELETAL-MUSCLE; BED REST; ARTIFICIAL GRAVITY; SIMULATED MICROGRAVITY; ORTHOSTATIC TOLERANCE; ERGOMETRIC EXERCISE; MOTION SICKNESS Multiple languages Physiology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/69134