Abstract
Purpose
Exercise-induced muscle pain is a self-limiting condition which impacts physical activity habits. Transcutaneous electrical nerve stimulation (TENS) promotes pain reduction and functional improvement in different pain conditions. We propose that applying TENS during exercise might reduce pain and improve physical performance. Thus, we aimed to investigate immediate effects of TENS applied during resistance exercise.
Methods
Healthy subjects of both sexes, irregularly active or sedentary were assigned into two groups: active (n = 24) or placebo (n = 22) TENS. The study was conducted over five moments: on day 0, subjects were recruited, on day 1 subjects performed the one-repetition maximum test (1RM); 72 h later, on day 2, 1RM was retested; 48 h later, on day 3, TENS was applied during a functional-resisted exercise protocol for upper limbs (bench press and rowing), with an intensity of 80% of 1RM; and 24 h after, on day 4, subjects were reevaluated. Assessment included pain intensity at rest and with movement, pressure pain thresholds, and muscle fatigue.
Results
TENS did not reduce pain intensity when compared to placebo (p > 0.05). TENS reduce PPT in the latissmus dorsi: p = 0.02 and anterior tibialis: p = 0.04 in immediate reassessment. Immediate effects of TENS were significant for fatigue perception at rest (p = 0.01) and number of maximum repetitions during exercise sets, starting from the 5th set of rowing exercise (p = 0.002).
Conclusion
Our results show that TENS did not reduce pain perception in healthy individuals, but its use induced increased muscle action, contributing to a greater fatigue perception.
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Abbreviations
- 1RM:
-
1 maximum repetition test
- BMI:
-
Body mass index
- CPM:
-
Conditioned pain modulation
- DASH:
-
Disabilities of the arm, shoulder and hand questionnaire
- DBP:
-
Diastolic blood pressure
- DOMS:
-
Delayed-onset muscle soreness
- HR:
-
Heart rate
- IPAQ:
-
Physical activity questionnaire
- ME:
-
Muscle endurance
- MF:
-
Muscle fatigue
- PAR-Q:
-
Physical activity readiness questionnaire
- PI:
-
Pain intensity
- PO:
-
Power output
- PPT:
-
Pressure pain threshold
- ReBEC:
-
Brazilian registry of clinical trials
- RR:
-
Respiratory rate
- SBP:
-
Systolic blood pressure
- SpO2 :
-
Peripheral oxygen saturation
- ST:
-
Temporal summation
- TENS:
-
Transcutaneous electrical nerve stimulation
- TR:
-
Thermoregulation
- NMDA:
-
N-metil-d-aspartato
- NES:
-
Neuromuscular electrical stimulation
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Acknowledgements
MAM, TABP, AGRN and MEDSG conceived and designed the study. LMT, BTQL, LMSC conducted the experiment. MAM and JMDS performed data analysis. MAM wrote the manuscript. LVL and JMDS reviewed the manuscript. All authors agree with the final version of the manuscript.
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MAM, TABP, AGRN and MEDSG conceived and designed the study. LMT, BTQL, LMSC conducted the experiment. MAM and JMDS performed data analysis. MAM wrote the manuscript. LVL and JMDS reviewed the manuscript. All authors agree with the final version of the manuscript.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Communicated by Bénédicte Schepens.
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Menezes, M.A., Pereira, T.A.B., Tavares, L.M. et al. Immediate effects of transcutaneous electrical nerve stimulation (TENS) administered during resistance exercise on pain intensity and physical performance of healthy subjects: a randomized clinical trial. Eur J Appl Physiol 118, 1941–1958 (2018). https://doi.org/10.1007/s00421-018-3919-7
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DOI: https://doi.org/10.1007/s00421-018-3919-7