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  • 1
    Online Resource
    Online Resource
    Comparison of the Acute Effects of Foam Rolling with High and Low Vibration Frequencies on Eccentrically Damaged Muscle
    Journal of Sports Science and Medicine ; 2022
    In:  Journal of Sports Science and Medicine
    Details
    In: Journal of Sports Science and Medicine, Journal of Sports Science and Medicine
    Abstract: Previous research has shown that vibration foam rolling (VFR) on damaged muscle shows greater improvement in muscle soreness and range of motion (ROM) compared with foam rolling (FR) without vibration. However, the effect of frequency in VFR on muscle soreness and loss of function caused by damaged muscles is unknown. The purpose of this study was to compare the acute effects of 90-s low-frequency (LF)- and high-frequency (HF)-VFR intervention on ROM, muscle soreness, muscle strength, and performance of eccentrically damaged muscle. Study participants were sedentary healthy adult volunteers (n = 28) who performed a bout of eccentric exercise of the knee extensors with the dominant leg and received 90-s LF-VFR or HF-VFR intervention of the quadriceps 48 h after the eccentric exercise. The dependent variables were measured before the eccentric exercise (baseline) and before (pre-intervention) and after VFR intervention (post-intervention) 48 h after the eccentric exercise. The results showed that both LF-VFR and HF-VFR similarly (p 〈 0.05) improved the knee flexion ROM (11.3 ± 7.2%), muscle soreness at palpation (-37.9 ± 17.2%), and countermovement jump height (12.4 ± 12.9%). It was concluded that it was not necessary to perform VFR with a high frequency to improve muscle soreness and function.
    Type of Medium: Online Resource
    ISSN: 1303-2968
    URL: Journal
    URL: Article
    DOI: 10.52082/jssm
    DOI: 10.52082/jssm.2022.112
    Language: English
    Publisher: Journal of Sports Science and Medicine
    Publication Date: 2022
    detail.hit.zdb_id: 2075564-8
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  • 2
    Online Resource
    Online Resource
    The Effect of Static Compression via Vibration Foam Rolling on Eccentrically Damaged Muscle
    MDPI AG ; 2022
    In:  International Journal of Environmental Research and Public Health Vol. 19, No. 3 ( 2022-02-05), p. 1823-
    Details
    In: International Journal of Environmental Research and Public Health, MDPI AG, Vol. 19, No. 3 ( 2022-02-05), p. 1823-
    Abstract: Previous research has shown that vibration foam rolling (VFR) on damaged muscle can result in improvements in muscle soreness and range of motion (ROM). Furthermore, static compression via VFR (i.e., VFR without rolling) can increase the ROM and decrease the muscle stiffness of non-damaged muscle. Therefore, it is likely that static compression via VFR on eccentrically damaged muscle can mitigate muscle soreness and the decrease in ROM, and the decrease in muscle strength. The purpose of this study was to investigate the acute effects of a 90 s bout of VFR applied as a static compression on an eccentrically damaged quadriceps muscle, measuring ROM, muscle soreness, muscle strength, and jump performance. This study was a single-arm repeated measure design. Study participants were sedentary healthy male volunteers (n = 14, 20.4 ± 0.8 years) who had not performed habitual exercise activities or any regular resistance training for at least 6 months before the experiment. All participants performed a bout of eccentric exercise of the knee extensors with the dominant leg and then received a 90 s bout of static compression via VFR of the quadriceps 48 h after the eccentric exercise. The knee flexion ROM, muscle soreness at palpation, and countermovement jump height were measured before the eccentric exercise (baseline), before (pre-intervention) and after the VFR intervention (post-intervention), and 48 h after the eccentric exercise. The results showed that the static compression via VFR significantly (p 〈 0.05) improved the knee flexion ROM (6.5 ± 4.8%, d = 0.76), muscle soreness at palpation (−10.7 ± 8.6 mm, d = −0.68), and countermovement jump height (15.6 ± 16.0%, d = 0.49). Therefore, it can be concluded that static compression via VFR can improve muscle soreness and function.
    Type of Medium: Online Resource
    ISSN: 1660-4601
    URL: Article
    DOI: 10.3390/ijerph19031823
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2175195-X
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  • 3
    Online Resource
    Online Resource
    Efficacies of ultrasound and a handheld dynamometer to predict one-repetition maximum
    Society of Physical Therapy Science ; 2019
    In:  Journal of Physical Therapy Science Vol. 31, No. 10 ( 2019), p. 790-794
    Details
    In: Journal of Physical Therapy Science, Society of Physical Therapy Science, Vol. 31, No. 10 ( 2019), p. 790-794
    Type of Medium: Online Resource
    ISSN: 0915-5287 , 2187-5626
    URL: Article
    DOI: 10.1589/jpts.31.790
    Language: English
    Publisher: Society of Physical Therapy Science
    Publication Date: 2019
    detail.hit.zdb_id: 2038898-6
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  • 4
    Online Resource
    Online Resource
    The effect of low-intensity resistance training after heat stress on muscle size and strength of triceps brachii: a randomized controlled trial
    Springer Science and Business Media LLC ; 2019
    In:  BMC Musculoskeletal Disorders Vol. 20, No. 1 ( 2019-12)
    Details
    In: BMC Musculoskeletal Disorders, Springer Science and Business Media LLC, Vol. 20, No. 1 ( 2019-12)
    Abstract: The purpose of this study was to clarify whether there is a synergistic effect on muscular strength and hypertrophy when low-intensity resistance training is performed after heat stress. Methods Thirty healthy young male volunteers were randomly allocated to either the low-intensity resistance training with heat stress group or the control group. The control group performed low-intensity resistance training alone. In the low-intensity resistance training with heat stress group, a hot pack was applied to cover the muscle belly of the triceps brachii for 20 min before the training. The duration of the intervention was 6 weeks. In both groups, the training resistance was 30% of the one repetition maximum, applied in three sets with eight repetitions each and 60-s intervals. The one repetition maximum of elbow extension and muscle thickness of triceps brachii were measured before and after 6 weeks of low intensity resistance training. Results There was no significant change in the one-repetition maximum and muscle thickness in the control group, whereas there was a significant increase in the muscle strength and thickness in the low-intensity resistance training with heat stress group. Conclusion The combination of heat stress and low-intensity resistance training was an effective method for increasing muscle strength and volume. Trial registration University Hospital Medical Information Network Clinical Trials Registry ( UMIN000036167 ; March 11, 2019).
    Type of Medium: Online Resource
    ISSN: 1471-2474
    URL: Article
    DOI: 10.1186/s12891-019-2991-4
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2041355-5
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  • 5
    Online Resource
    Online Resource
    Greater effects by performing a small number of eccentric contractions daily than a larger number of them once a week
    Wiley ; 2022
    In:  Scandinavian Journal of Medicine & Science in Sports Vol. 32, No. 11 ( 2022-11), p. 1602-1614
    Details
    In: Scandinavian Journal of Medicine & Science in Sports, Wiley, Vol. 32, No. 11 ( 2022-11), p. 1602-1614
    Abstract: Our previous study found that one maximal voluntary eccentric contraction (MVC‐ECC) performed daily for 5 days a week for 4 weeks increased MVC‐ECC, isometric (MVC‐ISO), and concentric contraction (MVC‐CON) torque of the elbow flexors more than 10%. The present study investigated the effects of six maximal voluntary eccentric contractions on the MVC torques and biceps brachii and brachialis muscle thickness (MT). Thirty‐six healthy young adults were placed to one of the three groups ( N  = 12 per group); the 6 × 1 group that performed one set of six contractions once a week, the 6 × 5 group that performed one set of six contractions a day for 5 days a week, and the 30 × 1 group that performed five sets of six contractions a day in a week. The training duration was 4 weeks for all groups, and changes in MVC‐ECC, MVC‐CON and MVC‐ISO torque, and MT before and after the 4‐week training were compared among the groups. The 6 × 1 group did not show significant changes in muscle strength and MT. Significant ( p   〈  0.05) increases in MVC‐ECC (13.5 ± 11.5%), MVC‐ISO (9.3 ± 5.5%), MVC‐CON torque (11.1 ± 7.4%) were evident for the 6 × 5 group only, and increases in MT were found for the 6 × 5 (10.4 ± 4.4%) and 30 × 1 (8.0 ± 5.8%) groups without a significant difference. These results suggest that performing a small number of eccentric contractions 5 days a week is more effective for increasing muscle strength than performing a larger volume of eccentric contractions once a week. However, it appears that training volume is a factor for muscle hypertrophy in a short‐term training.
    Type of Medium: Online Resource
    ISSN: 0905-7188 , 1600-0838
    URL: Issue
    URL: Article
    DOI: 10.1111/sms.v32.11
    DOI: 10.1111/sms.14220
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2025503-2
    SSG: 31
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  • 6
    Online Resource
    Online Resource
    Comparison Between High- and Low-Intensity Static Stretching Training Program on Active and Passive Properties of Plantar Flexors
    Frontiers Media SA ; 2021
    In:  Frontiers in Physiology Vol. 12 ( 2021-12-17)
    Details
    In: Frontiers in Physiology, Frontiers Media SA, Vol. 12 ( 2021-12-17)
    Abstract: The purpose of this study was to compare two static stretching (SS) training programs at high-intensity (HI-SS) and low-intensity (LI-SS) on passive and active properties of the plantar flexor muscles. Forty healthy young men were randomly allocated into three groups: HI-SS intervention group ( n = 14), LI-SS intervention group ( n = 13), and non-intervention control group ( n = 13). An 11-point numerical scale (0–10; none to very painful stretching) was used to determine SS intensity. HI-SS and LI-SS stretched at 6–7 and 0–1 intensities, respectively, both in 3 sets of 60 s, 3×/week, for 4 weeks. Dorsiflexion range of motion (ROM), gastrocnemius muscle stiffness, muscle strength, drop jump height, and muscle architecture were assessed before and after SS training program. The HI-SS group improved more than LI-SS in ROM (40 vs. 15%) and decreased muscle stiffness (−57 vs. −24%), while no significant change was observed for muscle strength, drop jump height, and muscle architecture in both groups. The control group presented no significant change in any variable. Performing HI-SS is more effective than LI-SS for increasing ROM and decreasing muscle stiffness of plantar flexor muscles following a 4-week training period in young men. However, SS may not increase muscle strength or hypertrophy, regardless of the stretching discomfort intensity.
    Type of Medium: Online Resource
    ISSN: 1664-042X
    URL: Article
    DOI: 10.3389/fphys.2021.796497
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2564217-0
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  • 7
    Online Resource
    Online Resource
    Effects of Static Stretching With High-Intensity and Short-Duration or Low-Intensity and Long-Duration on Range of Motion and Muscle Stiffness
    Frontiers Media SA ; 2020
    In:  Frontiers in Physiology Vol. 11 ( 2020-11-20)
    Details
    In: Frontiers in Physiology, Frontiers Media SA, Vol. 11 ( 2020-11-20)
    Abstract: This study investigated the effects of static stretching (SS) delivered with the same load but using two protocols – high-intensity and short-duration and low-intensity and long-duration – on range of motion (ROM) and muscle stiffness. A total of 18 healthy students participated in the study. They randomly performed high-intensity and short-duration (120% and 100 s) or low-intensity and long-duration (50% and 240 s) SS. Outcomes were assessed on ROM, passive torque at dorsiflexion ROM, and shear elastic modulus of the medial gastrocnemius before and after static stretching. The results showed that ROM increased significantly at post-stretching compared to that at pre-stretching in both high-intensity and short-duration [+6.1° ± 4.6° (Δ25.7 ± 19.9%)] and low-intensity and long-duration [+3.6° ± 2.3° (Δ16.0 ± 11.8%)] . Also, the ROM was significantly higher at post-stretching in high-intensity and short-duration conditions than that in low-intensity and long-duration. The passive torque at dorsiflexion ROM was significantly increased in both high-intensity and short-duration [+5.8 ± 12.8 Nm (Δ22.9 ± 40.5%)] and low-intensity and long-duration [+2.1 ± 3.4 Nm (Δ6.9 ± 10.8%)] conditions, but no significant differences were observed between both conditions. The shear elastic modulus was significantly decreased in both high-intensity and short-duration [−8.8 ± 6.1 kPa (Δ − 38.8 ± 14.5%)] and low-intensity and long-duration [−8.0 ± 12.8 kPa (Δ − 22.2 ± 33.8%)] conditions. Moreover, the relative change in shear elastic modulus in the high-intensity and short-duration SS was significantly greater than that in low-intensity and long-duration SS. Our results suggest that a higher intensity of the static stretching should be conducted to increase ROM and decrease muscle stiffness, even for a short time.
    Type of Medium: Online Resource
    ISSN: 1664-042X
    URL: Article
    DOI: 10.3389/fphys.2020.601912
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2020
    detail.hit.zdb_id: 2564217-0
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  • 8
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    Online Resource
    The Comparison of Different Stretching Intensities on the Range of Motion and Muscle Stiffness of the Quadriceps Muscles
    Frontiers Media SA ; 2021
    In:  Frontiers in Physiology Vol. 11 ( 2021-1-13)
    Details
    In: Frontiers in Physiology, Frontiers Media SA, Vol. 11 ( 2021-1-13)
    Abstract: Muscle strain is one of the most frequent sports injuries, having the rectus femoris (RF) muscle as the reported preferred site of quadriceps muscle strain. The decrease muscle stiffness could be an effective RF muscle strain prevention. In recent studies, a high-intensity static stretching intervention decreased passive stiffness, though no study has investigated on the effect of the different static stretching intervention intensities on quadriceps muscle stiffness. The purpose of this study was to investigate the three different quadriceps muscle stiffness intensities (120 vs. 100 vs. 80%). Eighteen healthy, sedentary male volunteers participated in the study and randomly performed three intensities. The static stretching intervention was performed in knee flexion with 30° hip extension. Three 60-second stretching intervention with a 30-second interval were performed at each stretching intensity. We measured knee flexion range of motion and shear elastic modulus of the RF muscle used by ultrasonic shear-wave elastography before and after the static stretching intervention. Our results showed that the knee flexion range of motion was increased after 100% ( p & lt; 0.01) and 120% intensities ( p & lt; 0.01) static stretching intervention, not in 80% intensity ( p = 0.853). In addition, our results showed that the shear elastic modulus of the RF muscle was decreased only after 100% intensity static stretching intervention ( p & lt; 0.01), not after 80% ( p = 0.365), and 120% intensities ( p = 0.743). To prevent the quadriceps muscle strain, especially the RF muscle, 100%, not 120% (high) and 80% (low), intensity stretching could be beneficial in sports setting application.
    Type of Medium: Online Resource
    ISSN: 1664-042X
    URL: Article
    DOI: 10.3389/fphys.2020.628870
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2564217-0
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  • 9
    Online Resource
    Online Resource
    Effects of 5-Week Foam Rolling Intervention on Range of Motion and Muscle Stiffness
    Ovid Technologies (Wolters Kluwer Health) ; 2022
    In:  Journal of Strength and Conditioning Research Vol. 36, No. 7 ( 2022-07), p. 1890-1895
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 36, No. 7 ( 2022-07), p. 1890-1895
    Abstract: Kiyono, R, Onuma, R, Yasaka, K, Sato, S, Yahata, K, and Nakamura, M. Effects of 5-week foam rolling intervention on range of motion and muscle stiffness. J Strength Cond Res 36(7): 1890–1895, 2022—In clinical and sports settings, foam rolling (FR) intervention is widely used to increase the range of motion (ROM). However, the chronic effects of FR on ROM and muscle stiffness are unclear. The aim of this study was to investigate the effects of 5-week FR intervention on dorsiflexion ROM (DFROM) and shear elastic modulus of the medial gastrocnemius (MG) muscle. Accordingly, 30 healthy young adults were enrolled and randomly assigned to either the FR or control group with the former receiving 90 seconds of FR thrice per week over 5 weeks. Thereafter, DFROM, passive torque at DFROM, and shear elastic modulus of the MG during passive ankle dorsiflexion were assessed using a dynamometer and ultrasonography before and after 5 weeks. Our results showed that the FR group exhibited a significant increase in DFROM (Δ = 11.7%, p 〈 0.05, effect size = 0.39), but no changes in passive torque at DFROM, and shear elastic modulus at 0° and 10° dorsiflexion. Moreover, significant correlations were observed between change in DFROM and change in passive torque at DFROM in the FR group ( r s = 0.607, p = 0.016). These results suggested that FR was an effective method to increase DFROM given its ability to change passive torque at DFROM (stretch tolerance) without altering muscle stiffness.
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0000000000003757
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 10
    Online Resource
    Online Resource
    Relationship between Eccentric-Exercise-Induced Loss in Muscle Function to Muscle Soreness and Tissue Hardness
    MDPI AG ; 2022
    In:  Healthcare Vol. 10, No. 1 ( 2022-01-04), p. 96-
    Details
    In: Healthcare, MDPI AG, Vol. 10, No. 1 ( 2022-01-04), p. 96-
    Abstract: It is well-known that unusual exercise, especially eccentric contraction (ECC), could cause delayed-onset muscle soreness. However, the factors related to the loss of muscle strength and range of motion (ROM) caused by eccentrically damaged muscle, such as increases in muscle soreness, tissue hardness, and pain threshold, have not been investigated in detail. Thus, this study was conducted to investigate the factors related to the loss of muscle strength and ROM caused by eccentrically damaged muscle in a large sample. Fifty-six sedentary healthy young male volunteers were instructed to perform 60 repetitions of ECC exercise. The outcome variables were measured before and 48 h after the ECC exercise. The results showed that a decrease in ROM was correlated to an increase in tissue hardness, whereas a decrease in muscle strength was correlated to an increase in muscle soreness. Our results suggested that tissue hardness must be controlled for ROM loss, and muscle soreness must be controlled for muscle-strength loss.
    Type of Medium: Online Resource
    ISSN: 2227-9032
    URL: Article
    DOI: 10.3390/healthcare10010096
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2721009-1
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