The effect of short-term creatine loading on active range of movement

Nicholas Sculthorpe, Fergal Grace, Peter Jones, Iain Fletcher

Research output: Contribution to journalArticle

Abstract

During high-intensity exercise, intracellular creatine phosphate (PCr) is rapidly broken down to maintain adenosine triphosphate turnover. This has lead to the widespread use of creatine monohydrate as a nutritional ergogenic aid. However, the increase in intracellular PCr and the concomitant increase in intracellular water have not been investigated with regard to their effect on active range of movement (ROM). Forty male subjects (age, 24+/-3.2 years) underwent restricted randomization into 2 equal groups, either an intervention group (CS) or a control group (C). The CS group ingested 25 g.day(-1) of creatine monohydrate for 5 days, followed by 5 g.day(-1) for a further 3 days. Before (24 h before starting supplementation (PRE) and after (on the 8th day of supplementation (POST)) this loading phase, both groups underwent goniometry measurement of the shoulder, elbow, hip, and ankle. Data indicated significant reductions in active ROM in 3 movements: shoulder extension (57+/-11.3 degrees PRE vs. 48+/-11.2 degrees POST, p<0.01), shoulder abduction (183.4+/-6.8 degrees PRE vs. 180.3+/-5.1 degrees POST, p<0.05), and ankle dorsiflexion (14.2+/-4.7 degrees PRE vs. 12.1+/-6.4 degrees POST, p<0.01). There was also a significant increase in body mass for the CS group (83.6+/-6.2 kg vs. 85.2+/-6.3 kg, p<0.05). The results suggest that short-term supplementation with creatine monohydrate reduces the active ROM of shoulder extension and abduction and of ankle dorsiflexion. Although the mechanism for this is not fully understood, it may be related to the asymmetrical distribution of muscle mass around those joints.

Original languageEnglish
Pages (from-to)507-11
Number of pages5
JournalApplied Physiology, Nutrition, and Metabolism
Volume35
Issue number4
DOIs
Publication statusPublished - Aug 2010
Externally publishedYes

Fingerprint

Creatine
Ankle
Phosphocreatine
Random Allocation
Elbow
Hip
Adenosine Triphosphate
Joints
Muscles
Control Groups
Water

Keywords

  • Administration, Oral
  • Adult
  • Arthrometry, Articular
  • Beverages
  • Body Weight
  • Creatine
  • Dietary Supplements
  • Double-Blind Method
  • England
  • Humans
  • Joints
  • Male
  • Range of Motion, Articular
  • Time Factors
  • Young Adult

Cite this

Sculthorpe, Nicholas ; Grace, Fergal ; Jones, Peter ; Fletcher, Iain. / The effect of short-term creatine loading on active range of movement. In: Applied Physiology, Nutrition, and Metabolism. 2010 ; Vol. 35, No. 4. pp. 507-11.
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The effect of short-term creatine loading on active range of movement. / Sculthorpe, Nicholas; Grace, Fergal; Jones, Peter; Fletcher, Iain.

In: Applied Physiology, Nutrition, and Metabolism, Vol. 35, No. 4, 08.2010, p. 507-11.

Research output: Contribution to journalArticle

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T1 - The effect of short-term creatine loading on active range of movement

AU - Sculthorpe, Nicholas

AU - Grace, Fergal

AU - Jones, Peter

AU - Fletcher, Iain

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N2 - During high-intensity exercise, intracellular creatine phosphate (PCr) is rapidly broken down to maintain adenosine triphosphate turnover. This has lead to the widespread use of creatine monohydrate as a nutritional ergogenic aid. However, the increase in intracellular PCr and the concomitant increase in intracellular water have not been investigated with regard to their effect on active range of movement (ROM). Forty male subjects (age, 24+/-3.2 years) underwent restricted randomization into 2 equal groups, either an intervention group (CS) or a control group (C). The CS group ingested 25 g.day(-1) of creatine monohydrate for 5 days, followed by 5 g.day(-1) for a further 3 days. Before (24 h before starting supplementation (PRE) and after (on the 8th day of supplementation (POST)) this loading phase, both groups underwent goniometry measurement of the shoulder, elbow, hip, and ankle. Data indicated significant reductions in active ROM in 3 movements: shoulder extension (57+/-11.3 degrees PRE vs. 48+/-11.2 degrees POST, p<0.01), shoulder abduction (183.4+/-6.8 degrees PRE vs. 180.3+/-5.1 degrees POST, p<0.05), and ankle dorsiflexion (14.2+/-4.7 degrees PRE vs. 12.1+/-6.4 degrees POST, p<0.01). There was also a significant increase in body mass for the CS group (83.6+/-6.2 kg vs. 85.2+/-6.3 kg, p<0.05). The results suggest that short-term supplementation with creatine monohydrate reduces the active ROM of shoulder extension and abduction and of ankle dorsiflexion. Although the mechanism for this is not fully understood, it may be related to the asymmetrical distribution of muscle mass around those joints.

AB - During high-intensity exercise, intracellular creatine phosphate (PCr) is rapidly broken down to maintain adenosine triphosphate turnover. This has lead to the widespread use of creatine monohydrate as a nutritional ergogenic aid. However, the increase in intracellular PCr and the concomitant increase in intracellular water have not been investigated with regard to their effect on active range of movement (ROM). Forty male subjects (age, 24+/-3.2 years) underwent restricted randomization into 2 equal groups, either an intervention group (CS) or a control group (C). The CS group ingested 25 g.day(-1) of creatine monohydrate for 5 days, followed by 5 g.day(-1) for a further 3 days. Before (24 h before starting supplementation (PRE) and after (on the 8th day of supplementation (POST)) this loading phase, both groups underwent goniometry measurement of the shoulder, elbow, hip, and ankle. Data indicated significant reductions in active ROM in 3 movements: shoulder extension (57+/-11.3 degrees PRE vs. 48+/-11.2 degrees POST, p<0.01), shoulder abduction (183.4+/-6.8 degrees PRE vs. 180.3+/-5.1 degrees POST, p<0.05), and ankle dorsiflexion (14.2+/-4.7 degrees PRE vs. 12.1+/-6.4 degrees POST, p<0.01). There was also a significant increase in body mass for the CS group (83.6+/-6.2 kg vs. 85.2+/-6.3 kg, p<0.05). The results suggest that short-term supplementation with creatine monohydrate reduces the active ROM of shoulder extension and abduction and of ankle dorsiflexion. Although the mechanism for this is not fully understood, it may be related to the asymmetrical distribution of muscle mass around those joints.

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KW - Adult

KW - Arthrometry, Articular

KW - Beverages

KW - Body Weight

KW - Creatine

KW - Dietary Supplements

KW - Double-Blind Method

KW - England

KW - Humans

KW - Joints

KW - Male

KW - Range of Motion, Articular

KW - Time Factors

KW - Young Adult

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EP - 511

JO - Applied Physiology, Nutrition, and Metabolism

JF - Applied Physiology, Nutrition, and Metabolism

SN - 1715-5312

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