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Neuromuscular function and fatigability in people diagnosed with head and neck cancer before versus after treatment

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European Journal of Applied Physiology Aims and scope Submit manuscript

Abstract

Purpose

Treatment for head and neck cancer is associated with multiple side effects, including loss of body mass, impaired physical function and reduced health-related quality of life. This study aimed to investigate the impact of treatment (radiation therapy ± concurrent chemotherapy) on (i) muscle strength, muscle cross-sectional area and patient-reported outcomes, and (ii) central and peripheral alterations during a whole-body exercise task.

Methods

Ten people with head and neck cancer (4 female; 50 ± 9 years) completed a lab visit before and after (56 ± 30 days) completion of treatment. Participants performed a neuromuscular assessment (involving maximal isometric voluntary contractions in the knee extensors and electrical stimulation of the femoral nerve) before and during intermittent cycling to volitional exhaustion. Anthropometrics and patient-reported outcomes were also assessed.

Results

From before to after treatment, maximal isometric muscle strength was reduced (P = 0.002, d = 0.73), as was potentiated twitch force (P < 0.001, d = 0.62), and muscle cross-sectional area (e.g., vastus lateralis: P = 0.010, d = 0.64). Exercise time was reduced (P = 0.008, d = 0.62) and peripheral processes contributed to a reduction in maximal force due to cycling. After treatment, the severity of self-reported fatigue increased (P = 0.041, r = − 0.65) and health-related quality of life decreased (P = 0.012, r = − 0.79).

Conclusion

Neuromuscular function was impaired in patients with head and neck cancer after treatment. Whole-body exercise tolerance was reduced and resulted in predominantly peripheral, rather than central, disturbances to the neuromuscular system. Future research should evaluate strength training after treatment for head and neck cancer, with the overall aim of reducing fatigue and improving health-related quality of life.

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Abbreviations

ANOVA:

Analysis of variance

BF%:

Body fat percent

BMI:

Body mass index

CNS:

Central nervous system

CSA:

Cross-sectional area

EMG:

Electromyography

FACIT-F:

Functional assessment of chronic illness therapy—fatigue

FACT-H&N:

Functional assessment of cancer therapy—head & neck

FNES:

Femoral nerve electrical stimulation

HRQL:

Health-related quality of life

HPV:

Human papillomavirus

HNC:

Head and neck cancer

IQR:

Interquartile range

M-wave:

Compound muscle action potential

MIVC:

Maximal isometric voluntary contraction

PAR-Q+:

The Physical Activity Readiness Questionnaire for Everyone

Qpot :

Potentiated twitch amplitude

RF:

Rectus femoris

RPE:

Rating of perceived exertion

RPM:

Revolutions per minute

RMS-EMG:

Root means square of electromyography

SD:

Standard deviation

SIT:

Superimposed twitch

VA:

Voluntary activation

VL:

Vastus lateralis

ηp2 :

Partial eta squared

References

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Author information

Authors and Affiliations

Authors

Contributions

RT and GYM conceived and designed the study. CL and RT were responsible for recruitment, data collection, statistical analysis and interpretation of the data. CL drafted the manuscript. RT, GYM, NCR, HL and GF provided critical revisions of the manuscript and contributed important intellectual contents. All authors approved the final manuscript.

Corresponding author

Correspondence to Rosie Twomey.

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Conflict of interest

All authors declare no conflict of interest.

Additional information

Communicated by Nicolas Place.

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Lavigne, C., Lau, H., Francis, G. et al. Neuromuscular function and fatigability in people diagnosed with head and neck cancer before versus after treatment. Eur J Appl Physiol 120, 1289–1304 (2020). https://doi.org/10.1007/s00421-020-04362-0

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  • DOI: https://doi.org/10.1007/s00421-020-04362-0

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