Abstract
Acute lymphoblastic leukaemia/lymphoma (ALL/LBL) and its treatment interfere with normal physical functioning. However, it remains unclear how physical fitness (PF) is affected throughout treatment for ALL/LBL. Sixty-two patients (2.1 to 18.3 years) treated for ALL/LBL underwent four physical tests at nine timepoints from baseline up to 6 months post-treatment. We assessed muscle strength of the quadriceps and tibialis anterior, standing broad jump test (SBJ) for functional mobility and six-minute walk test (6MWT) for endurance. One-sample t-tests were used to compare our results to the norm at each timepoint. Norm-referenced Z-scores were predicted based on time, risk group and age at diagnosis, using linear mixed models. Quadriceps strength, SBJ and 6MWT scores were significantly lower than norm values at all timepoints from diagnosis up to 6 months after maintenance therapy. Significant decreases over time were encountered for quadriceps strength and SBJ, mainly occurring after induction therapy (F = 3.568, p < 0.001 and F = 2.699, p = 0.008, respectively). Age at diagnosis was a significant predictor for tibialis anterior strength (F = 5.266, p = 0.025), SBJ (F = 70.422, p < 0.001) and 6MWT (F = 15.890, p < 0.001) performances, with lower results in adolescents at all timepoints. Six months after treatment, quadriceps strength, 6MWT and SBJ scores remained below expected levels.
Conclusion: The decreased quadriceps strength, functional mobility and endurance at all timepoints, with a large deterioration following induction therapy, suggest the need for early interventions, specifically in the adolescent population. The continued low results 6 months after therapy emphasise the importance of long-term rehabilitation.
What is Known: •Acute lymphoblastic leukaemia is the most common type of cancer among children, with increasing survival rates due to therapeutic improvements. •Acute lymphoblastic leukaemia/lymphoma and its treatment can cause muscle weakness, neuromuscular toxicity and a decreased cardiopulmonary fitness. Together with physical inactivity, this can result in a decreased physical fitness. | |
What is New: •Quadriceps strength, functional mobility and endurance are decreased during treatment for acute lymphoblastic leukaemia/lymphoma. The lowest measurements are observed after induction therapy, suggesting the need for early interventions. •We observed continued lower results for quadriceps strength, functional mobility and endurance at the end of treatment, up to 6 months after therapy, supporting the need for long-term rehabilitation. |
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Abbreviations
- 6MWT:
-
Six-minute walk test
- 6MP:
-
6-Mercaptopurine
- AIC:
-
Akaike’s Information Criteria
- ALL:
-
Acute lymphoblastic leukaemia
- AR:
-
Average risk
- ARA-C:
-
Cytarabine
- CR:
-
Complete remission
- D:
-
Day
- Df:
-
Degrees of freedom
- EORTC-CLG:
-
European Organisation for Research and Treatment of Cancer, Children’s Leukaemia Group
- H:
-
Hour
- IT:
-
Intrathecally
- IV:
-
Intravenously
- LBL:
-
Lymphoblastic lymphoma
- MTX:
-
Methotrexate
- N:
-
Number of observations
- PF:
-
Physical fitness
- PO:
-
Orally
- POEM:
-
Paediatric Oncology Exercise Manual
- SBJ:
-
Standing broad jump
- SD:
-
Standard deviation
- Sig:
-
Significance
- T:
-
Timepoint
- VHR:
-
Very high risk
- VLR:
-
Very low risk
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Acknowledgements
The authors acknowledge Julie Uytterhoeven and Marine Van Hollebeke for their help in collecting data and for taking the first steps in this project.
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All authors contributed to the study conception and design. Material preparation and data collection were performed by MG, VD and EV. Data analysis was performed by CS and AV. The first draft of the manuscript was written by AV and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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The procedures used in this study adhere to the tenets of the Declaration of Helsinki. Approval was granted by the Ethics Committee of the University Hospitals of KU Leuven (Date: February 22, 2013, No: B322201317067).
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Written informed consent was obtained from the parents. No additional consent was requested for data sharing, so data are only available in case of additional requests and approval by the ethical committee.
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Vriens, A., Verschueren, S., Vanrusselt, D. et al. Physical fitness throughout chemotherapy in children with acute lymphoblastic leukaemia and lymphoma. Eur J Pediatr 182, 813–824 (2023). https://doi.org/10.1007/s00431-022-04741-z
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DOI: https://doi.org/10.1007/s00431-022-04741-z