Concentric and eccentric isokinetic resistance training similarly increases muscular strength, fat-free soft tissue mass, and specific bone mineral measurements in young women

Nickols‐Richardson, Sharon M.; Miller, Larry E.; Wootten, David F.; Ramp, Warren K.; Herbert, William G.

doi:10.1007/s00198-006-0305-9

Cited by 85 publications

(89 citation statements)

References 30 publications

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“…Females with 8 months of training showed a 1.2% improvement in bone density, and 20 weeks of training for young people resulted in a significant increase as well. 23,24 After the analysis of strength exercise in controls, low, and high intensities for 1 year, the high-intensity exercise group showed improvement in BMD. 25 It was reported that endurance running exercise was also helpful to BMD.…”

Section: Discussionmentioning

confidence: 99%

Relationship of Physical Activity Type, Nutrition, and Bone Mineral Density in Korean Adolescents

Kim

Lee

2017

JOMH

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Background and ObjectiveBone density reaches its peak in the mid-20s and manifests as osteoporosis and osteopenia with aging. Bone density is affected by body mass index, muscle mass, nutritional calcium and vitamin D, as well as lifestyle, type and duration of physical activity, and level of physical strength. The purpose of this study was to investigate the difference in diet and bone density according to physical activity level in growing male and female adolescents.

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Section: Discussionmentioning

confidence: 99%

Relationship of Physical Activity Type, Nutrition, and Bone Mineral Density in Korean Adolescents

Kim

Lee

2017

JOMH

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“…The development of isokinetic strength and skeletal response according to rising age in sports practice is one of the main focuses of several studies [1,2,4,[5][6][7][8]. However, it seems that soccer practice, requiring the repetition of several technical skills, such as kicking, jumping and landing, can promote bilateral differences between dominant and nondominant lower limbs [7], and further studies are required to understand this phenomenon [1].…”

Section: Discussionmentioning

confidence: 99%

“…Providing attention on both strength and BMD is also paying attention on injuries. Strength adaptation on a soccer player conducts at different development in the hamstrings and quadriceps and these are the major worry because of several injuries associated to strength unbalances [7]. On the other hand, increasing BMD provides a protection against possible bone fractures [2,4].…”

Section: Introductionmentioning

confidence: 99%

Variation of Isokinetic Strength and Bone Mineral Density in Youth Portuguese Soccer Players with Age

Mota¹,

Brito²,

Passos³

et al. 2014

TOSSJ

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Abstract:The aim of this study was to study the variation of isokinetic strength and bone mineral density on the lower limb in youth soccer players according to age level. Sixty-one youth male soccer players from three age groups (Under-19, Under-17, and Under-15) take part on the study. Hamstrings and quadriceps concentric strength was evaluated by isokinetic dynamometry, and body composition was assessed using Dual energy X-ray absorptiometry. The t-test of matched pairs, ANOVA, and Bonferroni post hoc comparisons were applied to localize differences by age group. Statistical criterion was set at 0.05. Strength and bone mineral density tended to develop with age with the furthest presenting higher values in the non dominant extremity in all age groups. Differences were found in peak torque of the quadriceps in the dominant limb between Under-15 and the other age groups (p<0.05). For the hamstrings peak torque and bone mineral density, differences were only found between the Under-19 and Under-15 (p<0.01). The Under-15 group diverged from the other two groups in the non-dominant limb in all variables. The non-dominant limb presented higher values of bone mineral density in all three groups (p<0.001). Bone mineral density seems to increase due to soccer practice, and this fact seems to be connected with strength development. Increasing muscle mass, which occurs with soccer practice, may increase the forces generated at the bones, thus leading to the development of bone mineral density.

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“…Isokinetic resistance training is powerful in improving muscular strength coming about because of high strengths delivered by muscles contracting at a consistent speed through the whole scope of joint movement. Isokinetic activities might be performed concentrically or eccentrically as external forces are applied to the limb [12]. Plyometric activities defined as eccentric loading instantly took after by a concentric contraction.…”

Section: Samah Attia El Shemy Kadrya Hosny Battecha Effect Of Isokimentioning

confidence: 99%

Effect of Isokinetic Versus Plyometric Training on Shoulder Proprioception and External to Internal Rotators Strength Ratio in Swimmer Children

Shemy¹,

Battecha²

2017

IJPR

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Background: Many exercise protocols intended to enhance kinesthetic awareness and muscular performance, however more investigations need to be directed to the restoration of muscular imbalances.Objective: To compare the impacts of isokinetic training and plyometric training of the rotator cuff muscles on shoulder proprioception and isokinetic strength ratios.Materials and Methods: Seventy five swimmer boys randomly assigned to three equal-sized groups: control group (A) had no strength training, study group (B) received isokinetic training and study group (C) received plyometric training for the rotator cuff muscles. Pre-post testing measurements included: kinesthetic measurements at 45° of internal rotation, 45° external rotation and 75° external rotation; and concentric external/ internal rotation strength ratios at angular velocities of 60°/s and 180°/s using a Biodex System 3 isokinetic dynamometer. The test procedure performed before and after the training period of eight weeks.Results: Both training groups showed pre-posttest significant differences in all measured variables with nonsignificant changes in the control group. When comparing the post-treatment results in both training groups, the isokinetic group showed the most significant improvement in the strength ratio. However, no significant differences in kinesthetic awareness found between both training groups. Conclusion:Isokinetic strengthening is the most effective strategy of adjusting strength ratios of the rotator cuff muscles. Moreover, both isokinetic and plyometric training enhanced kinesthetic awareness, neither technique was superior.

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Concentric and eccentric isokinetic resistance training similarly increases muscular strength, fat-free soft tissue mass, and specific bone mineral measurements in young women

Abstract: Regardless of the mode, high-intensity, slow-velocity IRT increases muscular strength and FFSTM of trained limbs and imparts benefits to TB BMC and site-specific BMD and BMC in young women.

Cited by 85 publications

References 30 publications

Relationship of Physical Activity Type, Nutrition, and Bone Mineral Density in Korean Adolescents

Relationship of Physical Activity Type, Nutrition, and Bone Mineral Density in Korean Adolescents

Variation of Isokinetic Strength and Bone Mineral Density in Youth Portuguese Soccer Players with Age

Effect of Isokinetic Versus Plyometric Training on Shoulder Proprioception and External to Internal Rotators Strength Ratio in Swimmer Children

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