Sensory and Electromyographic Mapping during Delayed-Onset Muscle Soreness

Hedayatpour, Nosratollah; Falla, Deborah; Arendt‐Nielsen, Lars; Farina, Dario

doi:10.1249/mss.0b013e31815b0dcb

Cited by 60 publications

(70 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…23,24 For example, Edwards et al 23 reported that, after 15 minutes of eccentric stepping exercise, muscle pain in the quadriceps femoris was located close to the distal insertion of the myotendinous junction of the vastus medialis and lateralis. Hedayatpour et al 25 observed a greater reduction in PPT in the distal quadriceps region than in the proximal region after 100 eccentric knee extensions. In contrast, Andersen et al 26 found that tibialis anterior muscle belly sites became more sensitive to pressure stimulation than muscle-tendon junction sites after eccentric exercise.…”

mentioning

confidence: 97%

Assessment of Muscle Pain Induced by Elbow-Flexor Eccentric Exercise

Lau

Blazevich

Newton

et al. 2015

Journal of Athletic Training

View full text Add to dashboard Cite

Context: Delayed-onset muscle soreness (DOMS) is a common muscle pain that many people experience and is often used as a model of acute muscle pain. Researchers have reported the effects of various interventions on DOMS, but different DOMS assessment protocols used in these studies make it difficult to compare the effects.Objective: To investigate DOMS characteristics after elbow-flexor eccentric exercise to establish a standardized DOMS assessment protocol.Design: Descriptive laboratory study. Setting: Research laboratory.Patients or Other Participants: Ten healthy, untrained men (21-39 years).Intervention(s): Participants performed 10 sets of 6 maximal isokinetic eccentric contractions of the elbow flexors.Main Outcome Measure(s): Indirect muscle-damage markers were maximal voluntary isometric contraction torque, range of motion, and serum creatine kinase activity. Muscle pain was assessed before exercise, immediately postexercise, and 1 to 5 days postexercise using (1) a visual analog scale (VAS), (2) a category ratio-10 scale (CR-10) when applying static pressure and palpation at different sites (3, 9, and 15 cm above the elbow crease), and (3) pressure-pain thresholds (PPTs) at 50 sites (pain mapping).Results: Maximal voluntary isometric contraction and range of motion decreased and creatine kinase activity increased postexercise, indicating muscle damage. Palpation induced greater pain than static pressure, and longitudinal and transverse palpations induced greater pain than circular palpation (P , .05). The PPT was lower in the medial region before exercise, but the pain-sensitive regions shifted to the central and distal regions of the biceps brachii at 1 to 3 days postexercise (P , .05). The VAS was correlated with the CR-10 scale (r ¼ 0.91, P , .05) but not with the PPT (r ¼ À0.28, P ¼ .45).Conclusions: The way in which muscles are assessed affects the pain level score. This finding suggests that pain level and pain threshold cannot be used interchangeably and that the central and distal regions of the biceps brachii should be included in DOMS assessment using the VAS, CR-10 scale, and PPT after elbow-flexor eccentric exercise.Key Words: muscle damage, delayed-onset muscle soreness, pressure-pain threshold, palpation, visual analog scale Key PointsDelayed-onset muscle soreness (DOMS) is induced by exercise consisting of eccentric muscle contractions and is regarded as mechanical hyperalgesia. Because DOMS is often used as a model of acute pain to investigate the effects of interventions on muscle pain in clinical trial studies, it is important to standardize the assessment protocol. However, no standardized protocol for DOMS assessment has been proposed. We propose a standardized protocol to assess DOMS of the biceps brachii after elbow-flexor eccentric exercise, a frequently used model.

show abstract

mentioning

confidence: 97%

Assessment of Muscle Pain Induced by Elbow-Flexor Eccentric Exercise

Lau

Blazevich

Newton

et al. 2015

Journal of Athletic Training

View full text Add to dashboard Cite

show abstract

“…EMG and vastus lateralis respectively) and anterior superior iliac spine (Hedayatpour, Falla, et al, 2008). Before electrode placement, the skin was shaved and lightly abraded at the selected locations.…”

Section: Resultsmentioning

confidence: 99%

“…The study was conducted in accordance with the Declaration of Helsinki, approved by the local Ethics Committee (BOJ 13950701), and written informed consent was obtained from all subjects prior to inclusion. The number of participants was based on previous studies examining the effects of exercise on neuromuscular activity of same muscle (vastus medialis, rectus femoris, vastus lateralis), which showed that 10 subjects were sufficient to show a difference Hedayatpour, Falla, Arendt-Nielsen, & Farina, 2008).…”

Section: Methods Subjectsmentioning

confidence: 99%

“…Average rectified value (ARV) was estimated from the EMG signals for time interval of 1 s using the Matlab code developed by Dario Farina (Hedayatpour, Falla, et al, 2008). The values obtained from 1 s long time interval in intervals of 10% of the time to task failure were averaged to obtain one representative value for each 10% interval.…”

Section: Signal Analysismentioning

confidence: 99%

See 1 more Smart Citation

Unilateral leg resistance training improves time to task failure of the contralateral untrained leg

Hedayatpour¹,

Golestani²,

Izanloo³

et al. 2017

Acta Gymnica

Self Cite

View full text Add to dashboard Cite

“…Electrodes were placed over the quadriceps components at 10% of the distance between medial border, superior border and lateral border of the patella (for vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) respectively) and anterior superior iliac spine 24 . Before electrode placement, the skin was shaved and lightly abraded at the selected locations.…”

Section: Surface Emg Recordingsmentioning

confidence: 99%

Time to task failure of the contralateral untrained limb after high load-low repetition eccentric and low load-high repetition resistance training

Hedayatpour

Golestani

Izanloo

et al. 2017

Motriz: rev. educ. fis.

Self Cite

View full text Add to dashboard Cite

-Aims: Cross-training is the process whereby training of one limb gives rise to enhancements in the performance of the opposite, untrained limb and may be dependent on type of muscle contractions performed. The aim of this study was to investigate whether unilateral resistance training using eccentric contraction is more effective than concentric resistance training to improve time to task failure in the contralateral untrained limb. Methods: Subjects completed 12 weeks of resistance training consisting of 36 sessions, using unilateral leg exercise. Sustained isometric knee extension performed at 50% of maxmal force until task failure for the contralateral untrained leg. Surface electromyography (EMG) signals were simultaneously recorded from contralateral untrained quadriceps (vastus medialis, rectus femoris, and vastus lateralis). Results: Time to task failure of the contralateral untrained leg and associated EMG activities significantly increased after 12 weeks of unilateral resistance training (p<0.05). However, percent increase in time to task failure and EMG amplitude after eccentric resistance training was significantly higher than concentric resistance training (p<0.05). Conclusion: This study concluded that unilateral eccentric resistance training is superior to concentric resistance training to increase time to task failure in the contralateral untrained limb.

show abstract

Sensory and Electromyographic Mapping during Delayed-Onset Muscle Soreness

Cited by 60 publications

References 39 publications

Assessment of Muscle Pain Induced by Elbow-Flexor Eccentric Exercise

Assessment of Muscle Pain Induced by Elbow-Flexor Eccentric Exercise

Unilateral leg resistance training improves time to task failure of the contralateral untrained leg

Time to task failure of the contralateral untrained limb after high load-low repetition eccentric and low load-high repetition resistance training

Contact Info

Product

Resources

About