Differences of activation pattern and damage in elbow flexor muscle after isokinetic eccentric contractions

Tsuchiya, Yosuke; Kikuchi, Naoki; Shirato, Minayuki; Ochi, Eisuke

doi:10.3233/ies-150578

Cited by 15 publications

(20 citation statements)

References 24 publications

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“…Subjects performed two 5-s MVCs at 90° elbow joint angle with a 15-s rest between contractions. The peak torque of the two contractions was used as the MVC torque as described in our previous study (Tsuchiya et al 2015 ). The test–retest reliability of the MVC measures based on coefficient of variation (CV) was 3.9 %.…”

Section: Methodsmentioning

confidence: 99%

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Eicosapentaenoic and docosahexaenoic acids-rich fish oil supplementation attenuates strength loss and limited joint range of motion after eccentric contractions: a randomized, double-blind, placebo-controlled, parallel-group trial

et al. 2016

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PurposeThis study investigated the effect of eicosapentaenoic and docosahexaenoic acids-rich fish oil (EPA + DHA) supplementation on eccentric contraction-induced muscle damage.MethodsTwenty-four healthy men were randomly assigned to consume the EPA + DHA supplement (EPA, n = 12) or placebo (PL, n = 12) by the double-blind method. Participants consumed EPA + DHA or placebo supplement for 8 weeks prior to exercise and continued it until 5 days after exercise. The EPA group consumed EPA + DHA-rich fish oil containing 600 mg EPA and 260 mg DHA per day. Subjects performed five sets of six maximal eccentric elbow flexion exercises. Changes in the maximal voluntary contraction (MVC) torque, range of motion (ROM), upper arm circumference, muscle soreness as well as serum creatine kinase, myoglobin, IL-6, and TNF-α levels in blood were assessed before, immediately after, and 1, 2, 3, and 5 days after exercise.ResultsMVC was significantly higher in the EPA group than in the PL group at 2–5 days after exercise (p < 0.05). ROM was also significantly greater in the EPA group than in the PL group at 1–5 days after exercise (p < 0.05). At only 3 days after exercise, muscle soreness of the brachialis was significantly greater in the PL group than in the EPA group (p < 0.05), with a concomitant increase in serum IL-6 levels in the PL group.ConclusionEight-week EPA + DHA supplementation attenuates strength loss and limited ROM after exercise. The supplementation also attenuates muscle soreness and elevates cytokine level, but the effect is limited.

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Section: Methodsmentioning

confidence: 99%

“…The flexed joint angle was determined when subjects attempted to fully flex the joint from an equally fully extended position with the hand supinated. ROM was calculated by subtracting the flexed joint angle from the extended joint angle (Tsuchiya et al 2015 ). The test–retest reliability of the ROM measures based on CV was 4.2 %.…”

Section: Methodsmentioning

confidence: 99%

Eicosapentaenoic and docosahexaenoic acids-rich fish oil supplementation attenuates strength loss and limited joint range of motion after eccentric contractions: a randomized, double-blind, placebo-controlled, parallel-group trial

et al. 2016

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“…Nosaka et al [ 24 ] reported that maximal isometric strength loss was −45 % at day 1 and −37 % at day 4 after 24 maximal eccentric exercises on the elbow flexors. In our recent study, the significant muscle strength loss continued until 3 days after 30 eccentric elbow contractions were performed [ 25 ]. In the present study, the percentage of the baseline value of maximal isometric strength loss in all of the groups was −37 % at day 1, −24 % at days 2 and 3, −33 % at day 5 after 42 maximum eccentric contractions.…”

Section: Resultsmentioning

confidence: 99%

Effects of combined β-hydroxy-β-methylbutyrate (HMB) and whey protein ingestion on symptoms of eccentric exercise-induced muscle damage

Shirato

Tsuchiya

Sato

et al. 2016

Journal of the International Society of Sports Nutrition

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BackgroundThe purpose of this study was to examine the effects of combined β-hydroxy-β-methylbutyrate (HMB) and whey protein ingestion on muscle strength and damage following a single bout of eccentric exercise.MethodsEighteen untrained male subjects were assigned to HMB and Whey protein (HMB + Whey; 3 g/day HMB and 36.6 g/day whey protein, n = 6), HMB (3 g/day, n = 6), or whey protein (36.6 g/day, n = 6) groups. Ingestion commenced 7 days before non-dominant elbow flexor eccentric exercise (30 deg/sec, 6 reps × 7 sets) and continued until 4 days post-exercise. The maximal isometric strength, muscle soreness, plasma creatine kinase (CK), lactate dehydrogenase (LDH) were assessed pre-exercise, and at 1, 2, 3, and 5 days after exercise.ResultsThe change scores of maximal isometric strength significantly decreased at day 1, 2, and 5 in the whey protein group compared to pre value and that in HMB + Whey protein and HMB groups decreased at day 1 and 5. The muscle soreness significantly increased in the whey and HMB + Whey protein groups at day 3 compared to pre value (p < 0.05). CK and LDH significantly increased (time effect: p < 0.05) after exercise. However, all data were not significant difference among the groups.ConclusionsThese results suggest that ingestion of combined HMB and whey protein does not have a role to inhibit muscle strength loss and soreness, and decrease in muscle damage markers after eccentric exercise in comparison with HMB and whey protein alone.

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“…To examine the ROM of the elbow joint, two elbow joint angles (extended and exed) were measured using a goniometer (Takase Medical, Tokyo, Japan). The extended joint angle was recorded while the participant attempted to fully extend the joint with the elbow held by his side and the hand in supination 7,14,15 . The exed joint angle was identi ed while the participant attempted to fully ex the joint from an equally fully extended position with the hand supinated.…”

Section: Range Of Motion Of the Elbow Jointmentioning

confidence: 99%

“…Muscle soreness in the elbow exors was assessed using a 10-cm visual analog scale in which 0 indicated "no pain" and 10 indicated "unbearable imaginable" 7,14,15 . The participant relaxed his arm in a natural position.…”

Section: Muscle Sorenessmentioning

confidence: 99%

4-week eicosapentaenoic acid-rich fish oil supplementation partially protects muscular damage following eccentric contractions

Tsuchiya

Ueda

Yanagimoto

et al. 2020

Preprint

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Background We previously showed that the 8-week supplementation of fish oil attenuates muscle damage. However, the effect of a shorter period of fish oil supplementation is unclear. The present study investigates the effect of supplementation of fish oil in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) for 4 weeks on muscular damage caused by eccentric contractions (ECCs) of the elbow flexors. Methods Twenty-two untrained men were recruited in this double-blind, placebo-controlled, parallel design study and the subjects were randomly assigned to the EPA and DHA group (EPA, n = 11) and placebo group (PL, n = 11). They consumed either EPA 600 mg and DHA 260 mg per day or placebo supplement for 4 weeks prior to exercise. Subjects performed 60 ECCs at 100% maximal voluntary contraction (MVC) using a dumbbell. Changes in MVC torque, range of motion (ROM), upper arm circumference, muscle soreness, echo intensity, muscle thickness, serum creatine kinase (CK), and interleukin-6 (IL-6) were assessed before exercise; immediately after exercise; and 1, 2, 3, and 5 days after exercise. Results ROM was significantly higher in the EPA group than in the PL group immediately after performing ECCs (p < 0.05). No differences between groups were observed in terms of MVC torque, upper arm circumference, muscle soreness, echo intensity, and thickness. A significant difference was observed in serum CK 3 days after ECCs (p < 0.05). Conclusion We concluded that shorter period EPA and DHA supplementation benefits joint flexibility and protection of muscle fiber following ECCs.

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Differences of activation pattern and damage in elbow flexor muscle after isokinetic eccentric contractions

Cited by 15 publications

References 24 publications

Eicosapentaenoic and docosahexaenoic acids-rich fish oil supplementation attenuates strength loss and limited joint range of motion after eccentric contractions: a randomized, double-blind, placebo-controlled, parallel-group trial

Eicosapentaenoic and docosahexaenoic acids-rich fish oil supplementation attenuates strength loss and limited joint range of motion after eccentric contractions: a randomized, double-blind, placebo-controlled, parallel-group trial

Effects of combined β-hydroxy-β-methylbutyrate (HMB) and whey protein ingestion on symptoms of eccentric exercise-induced muscle damage

4-week eicosapentaenoic acid-rich fish oil supplementation partially protects muscular damage following eccentric contractions

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