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Comparative Study
. 2025 Aug 21;145(1):418.
doi: 10.1007/s00402-025-06037-x.

High-level activity and access to sport following lower limb amputation due to malignant musculoskeletal tumors versus trauma: a prospective comparative study

Astrid Schenker  1 , Sebastian I Wolf  2 , Merkur Alimusaj  3 , Cornelia Putz  3 , Burkhard Lehner  3 , Julia Block  2
Affiliations
Comparative Study

High-level activity and access to sport following lower limb amputation due to malignant musculoskeletal tumors versus trauma: a prospective comparative study

Astrid Schenker et al. Arch Orthop Trauma Surg. .

Abstract

Introduction: Patients with musculoskeletal tumors who undergo amputation show reduced physical function. To give these patients better expectations of their future physical capabilities and to enhance the evaluation and development of postoperative rehabilitation, we investigated high-level activity and access to sport using objective measurements and questionnaires. We then compared the results to those of amputees who had undergone amputation due to trauma.

Materials and methods: In a prospective, monocentric study, we evaluated and correlated the results of the conventional mobility tests such as "timed-up-and-go" test (TUG), "2-Minute-Walk-Test" (2MWT), as well as the "10-Meter-Walk-Test" (10MWT) with a test for high-level activity. In this contribution, the Comprehensive High-Level Activity Mobility Predictor (CHAMP), originally developed for male servicemembers, was tested for feasibility in our cohort. We examined eleven patients who underwent amputation due to primary malignant bone or soft-tissue sarcomas and compared the results with ten patients who experienced traumatic amputation, along with seventeen patients in the healthy control group.

Results: Patients with lower leg amputations due to malignant musculoskeletal tumors exhibited superior outcomes in general mobility and high-level activity mobility compared to those with traumatic amputations. Using a questionnaire, we were able to demonstrate that patients suffering after amputation because of musculoskeletal tumor exhibited higher motivation and a greater sense of health and well-being compared to participants who had undergone traumatic amputation.

Conclusions: The CHAMP can be utilized as a complementary tool in the rehabilitation of amputees to objectively assess high-level mobility and to guide targeted training and therapeutic interventions.

Keywords: Amputation; CHAMP; High-level activity; Outcome measurements; Rehabilitation; Sports; Tumor amputations.

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Conflict of interest statement

Declarations. Conflict of interest: The authors declare no competing interests. Informed consent: Informed consent was obtained from all subjects involved in the study. Written informed consent has been obtained from the patient(s) to publish this paper.

Figures

Fig. 1
Fig. 1
Flowchart of the participants included in the analysis
Fig. 2
Fig. 2
CHAMP – Comprehensive High-Level Activity Mobility Predictor: This includes four separate tests, which are evaluated using a table ranging from 0 to 10 points. With the four tests, the “Single Limb Stance (SLS)” (a), modified “Edgren Side Step Test” (ESST) (b), the “T-Test” (c), and the “Illinois Agility Test” (IAT) (d), sport-specific movements are assessed
Fig. 3
Fig. 3
Correlation of the CHAMP to the functional tests a comprehensive High-Level Activity Mobility Predictor (CHAMP) in the tumor group, trauma group, and control group; b TUG in the three groups; c 2MWT in the three groups; d 10MWT in the three groups
Fig. 4
Fig. 4
BORG scale was used to evaluate the effort of the four CHAMP items in each group with prosthesis. 1 = Single Limb Stance (SLS), 2 = modified Edgren Side Step Test (ESST), 3 = T-Test and 4 = Illinois Agility Test (IAT)
See this image and copyright information in PMC

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