The effects of exercise-induced muscle damage on maximal intensity intermittent exercise performance

Hdl Handle:
http://hdl.handle.net/10034/68456
Title:
The effects of exercise-induced muscle damage on maximal intensity intermittent exercise performance
Authors:
Twist, Craig; Eston, Roger
Abstract:
Exercise-induced muscle damage (EIMD) is a common occurrence following activities with a high eccentric component. Alterations to the torque-velocity relationship following EIMD would appear to have serious implications for athletic performance, particularly as they relate to impairment of maximal intensity exercise. However, this has been studied infrequently. The purpose of this study was to assess the effects of EIMD on maximal intermittent sprint performance. Ten male participants (age 22.4±3.2 years, height 178.6±5.2 cm, mass 80.6±10.7 kg) performed 10×6 s cycle ergometer sprints, interspersed with 24 s recovery against a load corresponding to 0.10 kp/kg and 10×10 m sprints from a standing start, each with 12 s active (walking) recovery. All variables were measured immediately before and at 30 min, 24, 48 and 72 h following a plyometric exercise protocol comprising of 10×10 maximal counter movement jumps. Repeated measures ANOVA showed significant changes over time (all P<0.05) for perceived soreness, plasma creatine kinase activity (CK), peak power output (PPO), sprint time and rate of fatigue. Soreness was significantly higher (P<0.01) than baseline values at all time intervals (3.1, 4.9, 5.5 and 3.2 at 30 min, 24, 48 and 72 h, respectively). CK was significantly elevated (P<0.05) at 24 h (239 IU/l) and 48 h (245 IU/l) compared to baseline (151 IU/l). PPO was significantly lower (P<0.05) than baseline (1,054 W) at all time intervals (888, 946, 852 and 895 W, at 30 min, 24, 48 and 72 h, respectively). The rate of fatigue over the ten cycling sprints was reduced compared to baseline, with the greatest reduction of 48% occurring at 48 h (P<0.01). This was largely attributed to the lower PPO in the initial repetitions, resulting in a lower starting point for the rate of fatigue. Values returned to normal at 72 h. Sprint times over 10 m were higher (P<0.05) at 30 min, 24 h and 48 h compared to baseline (1.96 s) with values corresponding to 2.01, 2.02 and 2.01 at 30 min, 24 h and 48 h, respectively. Values returned to baseline by 72 h. The results provide further evidence that, following a plyometric, muscle-damaging exercise protocol, the ability of the muscle to generate power is reduced for at least 3 days. This is also manifested by a small, but statistically significant reduction in very short-term (?2 s) intermittent sprint running performance. These findings have implications for appropriate training strategies in multiple sprint sports.
Affiliation:
University College Chester ; University of Exeter
Citation:
European Journal of Applied Physiology, 94(5/6), 2005, pp. 652-658
Publisher:
Spring-Verlag
Journal:
European Journal of Applied Physiology
Publication Date:
18-May-2009
URI:
http://hdl.handle.net/10034/68456
DOI:
10.1007/s00421-005-1357-9
Additional Links:
http://www.springerlink.com/content/100513/
Type:
Article
Language:
en
Description:
This article is not available through ChesterRep.
ISSN:
1439-6319; 1439-6327
Appears in Collections:
Sport and Exercise Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorTwist, Craig-
dc.contributor.authorEston, Roger-
dc.date.accessioned2009-05-18T12:38:44Z-
dc.date.available2009-05-18T12:38:44Z-
dc.date.issued2009-05-18T12:38:44Z-
dc.identifier.citationEuropean Journal of Applied Physiology, 94(5/6), 2005, pp. 652-658en
dc.identifier.issn1439-6319-
dc.identifier.issn1439-6327-
dc.identifier.doi10.1007/s00421-005-1357-9-
dc.identifier.urihttp://hdl.handle.net/10034/68456-
dc.descriptionThis article is not available through ChesterRep.en
dc.description.abstractExercise-induced muscle damage (EIMD) is a common occurrence following activities with a high eccentric component. Alterations to the torque-velocity relationship following EIMD would appear to have serious implications for athletic performance, particularly as they relate to impairment of maximal intensity exercise. However, this has been studied infrequently. The purpose of this study was to assess the effects of EIMD on maximal intermittent sprint performance. Ten male participants (age 22.4±3.2 years, height 178.6±5.2 cm, mass 80.6±10.7 kg) performed 10×6 s cycle ergometer sprints, interspersed with 24 s recovery against a load corresponding to 0.10 kp/kg and 10×10 m sprints from a standing start, each with 12 s active (walking) recovery. All variables were measured immediately before and at 30 min, 24, 48 and 72 h following a plyometric exercise protocol comprising of 10×10 maximal counter movement jumps. Repeated measures ANOVA showed significant changes over time (all P<0.05) for perceived soreness, plasma creatine kinase activity (CK), peak power output (PPO), sprint time and rate of fatigue. Soreness was significantly higher (P<0.01) than baseline values at all time intervals (3.1, 4.9, 5.5 and 3.2 at 30 min, 24, 48 and 72 h, respectively). CK was significantly elevated (P<0.05) at 24 h (239 IU/l) and 48 h (245 IU/l) compared to baseline (151 IU/l). PPO was significantly lower (P<0.05) than baseline (1,054 W) at all time intervals (888, 946, 852 and 895 W, at 30 min, 24, 48 and 72 h, respectively). The rate of fatigue over the ten cycling sprints was reduced compared to baseline, with the greatest reduction of 48% occurring at 48 h (P<0.01). This was largely attributed to the lower PPO in the initial repetitions, resulting in a lower starting point for the rate of fatigue. Values returned to normal at 72 h. Sprint times over 10 m were higher (P<0.05) at 30 min, 24 h and 48 h compared to baseline (1.96 s) with values corresponding to 2.01, 2.02 and 2.01 at 30 min, 24 h and 48 h, respectively. Values returned to baseline by 72 h. The results provide further evidence that, following a plyometric, muscle-damaging exercise protocol, the ability of the muscle to generate power is reduced for at least 3 days. This is also manifested by a small, but statistically significant reduction in very short-term (?2 s) intermittent sprint running performance. These findings have implications for appropriate training strategies in multiple sprint sports.en
dc.language.isoenen
dc.publisherSpring-Verlagen
dc.relation.urlhttp://www.springerlink.com/content/100513/en
dc.subjectplyometricsen
dc.subjectpeak power outputen
dc.subjectsprintingen
dc.subjectmuscle damageen
dc.titleThe effects of exercise-induced muscle damage on maximal intensity intermittent exercise performanceen
dc.typeArticleen
dc.contributor.departmentUniversity College Chester ; University of Exeteren
dc.identifier.journalEuropean Journal of Applied Physiologyen
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