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Effects of intensified military field training on jumping performance.
Int J Sports Med 2008; 29(1):45-52IJ

Abstract

A sensitive, reliable, field-expedient test may be valuable for monitoring interventions during periods of anticipated physical performance decline. The purpose of this study was to determine the capabilities of unloaded jumping tests for detecting decrements in physical performance following eight days of military sustained operations. Twenty-nine U. S. Marines (24 +/- 1 y; 180 +/- 6 cm; 82.5 +/- 8.2 kg) performed 1, 5 and 30 repetition(s) of unloaded countermovement jumps (UJ) before and after eight days of sustained operations (SUSOPS). Jump performance data was collected simultaneously using a switch mat (SM) and a linear position transducer (LPT). Jump height (m) and power (W) were highest using 1 UJ and declined 4.9 and 8.9%, respectively after SUSOPS. Jump power (JP) declined progressively over 30 UJ (20%). Five UJ offered no advantages over 1 UJ and was inadequate to examine changes in muscle fatigability (pre: 1294 +/- 138 W; post: 1250 +/- 165 W). The SM and a LPT were in agreement and had a high correlation (r = 0.92). One UJ was a sensitive, easy to implement test for monitoring the collective impact of high physical, nutritional, cognitive, and environmental stress on an individuals' physical performance before and after 8 days of SUSOPS, suggesting decrements in physical performance associated with overreaching can be detected by simply administered field-expedient jumping tests.

Authors+Show Affiliations

Military Performance Division, United States Army Research Institute of Environmental Medicine, Natick, MA 01760, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17879876

Citation

Welsh, T T., et al. "Effects of Intensified Military Field Training On Jumping Performance." International Journal of Sports Medicine, vol. 29, no. 1, 2008, pp. 45-52.
Welsh TT, Alemany JA, Montain SJ, et al. Effects of intensified military field training on jumping performance. Int J Sports Med. 2008;29(1):45-52.
Welsh, T. T., Alemany, J. A., Montain, S. J., Frykman, P. N., Tuckow, A. P., Young, A. J., & Nindl, B. C. (2008). Effects of intensified military field training on jumping performance. International Journal of Sports Medicine, 29(1), pp. 45-52.
Welsh TT, et al. Effects of Intensified Military Field Training On Jumping Performance. Int J Sports Med. 2008;29(1):45-52. PubMed PMID: 17879876.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of intensified military field training on jumping performance. AU - Welsh,T T, AU - Alemany,J A, AU - Montain,S J, AU - Frykman,P N, AU - Tuckow,A P, AU - Young,A J, AU - Nindl,B C, Y1 - 2007/09/18/ PY - 2007/9/21/pubmed PY - 2008/3/21/medline PY - 2007/9/21/entrez SP - 45 EP - 52 JF - International journal of sports medicine JO - Int J Sports Med VL - 29 IS - 1 N2 - A sensitive, reliable, field-expedient test may be valuable for monitoring interventions during periods of anticipated physical performance decline. The purpose of this study was to determine the capabilities of unloaded jumping tests for detecting decrements in physical performance following eight days of military sustained operations. Twenty-nine U. S. Marines (24 +/- 1 y; 180 +/- 6 cm; 82.5 +/- 8.2 kg) performed 1, 5 and 30 repetition(s) of unloaded countermovement jumps (UJ) before and after eight days of sustained operations (SUSOPS). Jump performance data was collected simultaneously using a switch mat (SM) and a linear position transducer (LPT). Jump height (m) and power (W) were highest using 1 UJ and declined 4.9 and 8.9%, respectively after SUSOPS. Jump power (JP) declined progressively over 30 UJ (20%). Five UJ offered no advantages over 1 UJ and was inadequate to examine changes in muscle fatigability (pre: 1294 +/- 138 W; post: 1250 +/- 165 W). The SM and a LPT were in agreement and had a high correlation (r = 0.92). One UJ was a sensitive, easy to implement test for monitoring the collective impact of high physical, nutritional, cognitive, and environmental stress on an individuals' physical performance before and after 8 days of SUSOPS, suggesting decrements in physical performance associated with overreaching can be detected by simply administered field-expedient jumping tests. SN - 0172-4622 UR - https://www.unboundmedicine.com/medline/citation/17879876/Effects_of_intensified_military_field_training_on_jumping_performance_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2007-964970 DB - PRIME DP - Unbound Medicine ER -