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Increased strength and physical performance with eccentric training in women with impaired glucose tolerance: a pilot study.

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Title: Increased strength and physical performance with eccentric training in women with impaired glucose tolerance: a pilot study.
Authors: Marcus RL (AUTHOR), LaStayo PC (AUTHOR), Dibble LE (AUTHOR), Hill L (AUTHOR), McClain DA (AUTHOR)
Source: Journal of Women's Health (15409996). Feb2009, Vol. 18 Issue 2, p253-260. 8p.
Subjects: Quadriceps muscle, Isometric exercise, Menopause, Insulin, Older women, Osteoporosis in women, Glucose tolerance tests, Soft tissue injuries, Control groups, Physiology
Abstract: BACKGROUND: Menopause is associated with both a loss of muscle mass and a worsening of insulin sensitivity (IS). Although eccentric resistance exercise (ECC) can effectively improve muscle mass over time, a single bout of ECC can worsen IS. This study assessed the effect of repeated ECC on IS, muscle mass, and function in postmenopausal women with impaired glucose tolerance (IGT). METHODS: Sixteen PM women (aged 56 years +/- 6.4) with IGT were randomly assigned to a 12-week, knee extensor ECC program (n = 10) or a nonexercise control group (CON) (n = 6). Participants underwent hyperinsulinemic-euglycemic clamps, dual-energy x-ray (DEXA) absorptiometry, quadriceps strength assessment, 6-minute walk (6MW) tests, and an assessment of steps taken per day before and after training. RESULTS: ECC participants experienced greater increases in leg lean soft tissue mass (ECC, 0.41 kg; CON, -0.53 kg; p = 0.03), quadriceps strength (ECC, 9.3 kg force; CON, -2.9 kg force; p = 0.02), and 6MW distance (ECC, 56.4 meters; CON, 3.3 meters; p = 0.03) than CON participants and demonstrated a trend toward more steps taken per day posttraining (ECC, +1747 steps; CON, +339 steps; p = 0.10). IS was unchanged. CONCLUSIONS: This novel exercise improves muscle mass and function without worsening IS in postmenopausal women with IGT. Because it can be performed at low levels of exertion and improves muscle mass and function without impairing IS, ECC should be used to ameliorate muscle loss in physically inactive postmenopausal women. The impact of longer-term ECC on IS should be investigated. Demonstrating that ECC does not worsen IS in this population is significant because it has promise to combat the muscle-mediated impairments common in aging women. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Women's Health (15409996) is the property of Mary Ann Liebert, Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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DbLabel: Psychology and Behavioral Sciences Collection
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Increased strength and physical performance with eccentric training in women with impaired glucose tolerance: a pilot study.
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  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Marcus+RL%22">Marcus RL</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22LaStayo+PC%22">LaStayo PC</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dibble+LE%22">Dibble LE</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hill+L%22">Hill L</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22McClain+DA%22">McClain DA</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Women's+Health+%2815409996%29%22">Journal of Women's Health (15409996)</searchLink>. Feb2009, Vol. 18 Issue 2, p253-260. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Quadriceps+muscle%22">Quadriceps muscle</searchLink><br /><searchLink fieldCode="DE" term="%22Isometric+exercise%22">Isometric exercise</searchLink><br /><searchLink fieldCode="DE" term="%22Menopause%22">Menopause</searchLink><br /><searchLink fieldCode="DE" term="%22Insulin%22">Insulin</searchLink><br /><searchLink fieldCode="DE" term="%22Older+women%22">Older women</searchLink><br /><searchLink fieldCode="DE" term="%22Osteoporosis+in+women%22">Osteoporosis in women</searchLink><br /><searchLink fieldCode="DE" term="%22Glucose+tolerance+tests%22">Glucose tolerance tests</searchLink><br /><searchLink fieldCode="DE" term="%22Soft+tissue+injuries%22">Soft tissue injuries</searchLink><br /><searchLink fieldCode="DE" term="%22Control+groups%22">Control groups</searchLink><br /><searchLink fieldCode="DE" term="%22Physiology%22">Physiology</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: BACKGROUND: Menopause is associated with both a loss of muscle mass and a worsening of insulin sensitivity (IS). Although eccentric resistance exercise (ECC) can effectively improve muscle mass over time, a single bout of ECC can worsen IS. This study assessed the effect of repeated ECC on IS, muscle mass, and function in postmenopausal women with impaired glucose tolerance (IGT). METHODS: Sixteen PM women (aged 56 years +/- 6.4) with IGT were randomly assigned to a 12-week, knee extensor ECC program (n = 10) or a nonexercise control group (CON) (n = 6). Participants underwent hyperinsulinemic-euglycemic clamps, dual-energy x-ray (DEXA) absorptiometry, quadriceps strength assessment, 6-minute walk (6MW) tests, and an assessment of steps taken per day before and after training. RESULTS: ECC participants experienced greater increases in leg lean soft tissue mass (ECC, 0.41 kg; CON, -0.53 kg; p = 0.03), quadriceps strength (ECC, 9.3 kg force; CON, -2.9 kg force; p = 0.02), and 6MW distance (ECC, 56.4 meters; CON, 3.3 meters; p = 0.03) than CON participants and demonstrated a trend toward more steps taken per day posttraining (ECC, +1747 steps; CON, +339 steps; p = 0.10). IS was unchanged. CONCLUSIONS: This novel exercise improves muscle mass and function without worsening IS in postmenopausal women with IGT. Because it can be performed at low levels of exertion and improves muscle mass and function without impairing IS, ECC should be used to ameliorate muscle loss in physically inactive postmenopausal women. The impact of longer-term ECC on IS should be investigated. Demonstrating that ECC does not worsen IS in this population is significant because it has promise to combat the muscle-mediated impairments common in aging women. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Women's Health (15409996) is the property of Mary Ann Liebert, Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=105450927
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1089/jwh.2007.0669
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 253
    Subjects:
      – SubjectFull: Quadriceps muscle
        Type: general
      – SubjectFull: Isometric exercise
        Type: general
      – SubjectFull: Menopause
        Type: general
      – SubjectFull: Insulin
        Type: general
      – SubjectFull: Older women
        Type: general
      – SubjectFull: Osteoporosis in women
        Type: general
      – SubjectFull: Glucose tolerance tests
        Type: general
      – SubjectFull: Soft tissue injuries
        Type: general
      – SubjectFull: Control groups
        Type: general
      – SubjectFull: Physiology
        Type: general
    Titles:
      – TitleFull: Increased strength and physical performance with eccentric training in women with impaired glucose tolerance: a pilot study.
        Type: main
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            NameFull: Marcus RL
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            NameFull: LaStayo PC
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            NameFull: Dibble LE
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            NameFull: Hill L
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            NameFull: McClain DA
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              M: 02
              Text: Feb2009
              Type: published
              Y: 2009
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              Value: 18
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              Value: 2
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            – TitleFull: Journal of Women's Health (15409996)
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