Localized-bioelectrical impedance vector analysis on mechanical property changes after muscle injury and damage

Inami, Takayuki; Yamaguchi, Sachi; Kim, Hyeon-Ki; Murayama, Mitsuyoshi

doi:10.23736/s0022-4707.22.14416-6

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The ICW was calculated using the following formula: ICW = TBW − ECW The multifrequency BIA device measured segmental impedances on the right arm, left arm, right leg, and left leg at the three mentioned frequencies. In this study, ECW, ICW, TBW, and ECW/TBW were used as indicators of dehydration for further analysis [16,18].…”

Section: Biamentioning

confidence: 99%

“…This method is also a non-invasive method used not only for analysis of body composition [ 15 ] but also for monitoring nutritional and hydration status. Only recently has BIA been utilized for vector analysis after muscle damage [ 16 ] and for estimating body water content, including extracellular, intracellular, and total body water (ECW, ICW, and TBW, respectively). Shiose et al reported that the ECW content increases at the onset of EIMD and that peak ECW content and peak creatine kinase are positively correlated [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments

Inami,

Yamaguchi,

Nishioka

et al. 2023

Sports

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The effects of contrast water therapy (CWT) on dehydration at moderate altitudes during training camps remain unknown. We hypothesized that CWT reduces dehydration resulting from training at moderate altitudes and improves performance, akin to conditions at sea level. A 13-day endurance training camp was held at a moderate altitude of 1100 m and included 22 university athletes, who were divided into two groups (CWT group, n = 12; control (CON) group, n = 10). The sample size was calculated based on an α level of 0.05, power (1 β) of 0.8, and effect size of 0.25 based on two-way ANOVA. Longitudinal changes over 13 days were compared using a two-group comparison model. Additionally, 16 athletes participated in an additional performance verification analysis. Subjective fatigue, body mass, and water content (total body water (TBW), extracellular water (ECW), and intracellular water) were measured using bioimpedance analysis every morning, and the titin N-terminal fragment in urine (UTF) was measured as an index of muscle damage. For performance verification, 10 consecutive jump performances (with the reactive strength index (RSI) as an indicator) were evaluated as neuromuscular function indices. The results indicated that the UTF did not significantly differ between the two groups. Moreover, the ECW/TBW values, indicative of dehydration, on days 4 and 5 in the CWT group were significantly lower than those in the CON group. However, there was no significant difference in RSI between the two groups. Therefore, although CWT reduces dehydration in the early stages of the training camp, it may not affect performance.

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Section: Biamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments

Inami,

Yamaguchi,

Nishioka

et al. 2023

Sports

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“…Only few previous studies have evaluated the biological changes caused by EIMD using BIA 12 . Extracellular water (ECW) content increases at the onset of EIMD, and there is a positive correlation (r = 0.654) between peak ECW content and peak creatine kinase 11 .…”

Section: Introductionmentioning

confidence: 99%

Bioimpedance analysis for identifying new indicators of exercise-induced muscle damage

Yamaguchi,

Inami,

Ishida

et al. 2024

Sci Rep

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A noninvasive, immediate, and convenient method for assessing muscle tissue status during exercise-induced muscle damage (EIMD) has not been established. This study was designed to assess and determine parameters suitable for measuring EIMD after eccentric exercise, using multi-frequency bioimpedance analysis (BIA). Thirty-five young male participants performed dumbbell exercises with their left arm, and their BIA parameters were measured at various time points up to 168 h post exercise using a multi-frequency BIA device. At all-time points, intra and extracellular water content was greater in the left arm than in the right arm, whereas the impedance, reactance, resistance, and phase angle were lower in the left arm than in the right arm. Established EIMD indices, such as maximal isometric voluntary contraction, were measured and used in correlational analyses. Only reactance was correlated with biomarkers, indicating muscle damage (r = − 0.56 to − 0.49). Furthermore, reactance was found to correlate well with indirect indicators of EIMD, suggesting that it may be a suitable marker for evaluating EIMD. However, the relationship with the limited evaluation indices employed in this study is constrained. Future studies should investigate the correlation between reactance and direct damage indicators, such as structural damage, observed in biopsies.

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“…Only few previous studies have evaluated the biological changes caused by EIMD using BIA 11 ; it has been reported that extracellular water (ECW) content increases at the onset of EIMD, and there is a positive correlation (r = 0.654) between peak ECW content and peak creatine kinase 10 . While examining the process of recovery from EIMD, it is important to consider physiological changes; no studies to date have used BIA in combination with markers, such as muscle strength markers, to assess recovery from EIMD.…”

Section: Introductionmentioning

confidence: 99%

Bioimpedance analysis for identifying new indicators of exercise-induced muscle damage

YAMAGUCHI,

Inami,

Hiroyuki

et al. 2023

Preprint

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To date, noninvasive and immediate assessment of muscle tissue status after exercise-induced muscle damage (EIMD) has not been established. This study was designed to assess and determine parameters suitable for measuring EIMD after eccentric exercise, using multi-frequency bioimpedance analysis (BIA). Thirty-five young male participants performed dumbbell exercises with their left arm, and BIA parameters were measured at time points up to 168 h post exercise using a multi-frequency BIA device. At all time points, intra and extracellular water content was greater in the left arm than in the right arm, and the impedance, reactance, resistance, and phase angle were lower in the left arm than in the right arm. Established indices of EIMD, such as maximal isometric voluntary contraction, were measured and used in correlational analyses. Only reactance was highly correlated with biomarkers indicating muscle damage; therefore among BIA parameters, reactance is the most suitable to assess EIMD.

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Localized-bioelectrical impedance vector analysis on mechanical property changes after muscle injury and damage

Cited by 3 publications

References 5 publications

The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments

The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments

Bioimpedance analysis for identifying new indicators of exercise-induced muscle damage

Bioimpedance analysis for identifying new indicators of exercise-induced muscle damage

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