Postoperative Exercise Training in Patients With Colorectal Liver Metastases Undergoing Surgery (ELMA)

BACKGROUND:

Colorectal cancer is the third most frequent type of cancer in Denmark, with more than 5000 new cases annually. Colorectal liver metastases (CRLM) develop in nearly one fourth of all patients with colorectal cancer, and poses a poor prognostic outlook, with low survival rates and short time to disease progression. Surgical resection, either upfront or following downstaging with perioperative treatments, confers substantial survival benefit in patients with CRLM, and may even comprise a curative treatment modality. However, surgery elicits a cascade of biological responses characterized by increased dissemination of tumor cells and modulation of neuroendocrine, inflammatory, and immunological factors. These local and systemic perturbations typically persist for days to weeks following surgery and may independently or in concert drive the onset of long-term disease progression. Under normal physiological conditions, exercise training is a potent modulator of immune function, systemic inflammation, and the neuroendocrine system, raising the possibility that perioperative exercise training may ameliorate the surgical stress response during and after surgery. However, in a recent systematic review and meta-analysis (submitted), we found that the effects and safety of preoperative and early postoperative exercise are unknown in patients with gastrointestinal cancers (including CRLM) due to lack of studies, widespread methodological issues, and poor ascertainment and reporting of adverse events. Safety is arguably the single most important consideration for the application perioperative exercise, and methodological robust trials evaluating the safety and tolerability of perioperative exercise training along with preliminary information on treatment efficacy are needed to inform the application of exercise in surgical oncology.

Against this background, we designed the present randomized controlled trial to evaluate the therapeutic role of postoperative exercise training in patients with CRLM undergoing open liver resection. The primary trial objective and hypothesis are:

1. To compare the number of serious adverse events (SAE) in standard care plus postoperative exercise (EX) vs. standard care alone (CON) in patients with colorectal liver metastases scheduled to undergo open liver resection. The primary research hypothesis is that the number of SAEs is non-inferior in EX vs. CON

The key secondary study objectives and hypotheses are: 2. To compare the effect of EX vs. CON on incidence of postoperative hospital admissions in patients with CRLM undergoing surgery. We hypothesize that the incidence of postoperative hospital admissions are non-inferior in EX vs. CON 3. To compare the effect of EX vs. CON on relative dose intensity of adjuvant chemotherapy and time from surgery to initiation of adjuvant chemotherapy in patients with CRLM undergoing surgery. We hypothesize that the relative dose intensity of adjuvant chemotherapy and time from surgery to initiation of adjuvant chemotherapy are non-inferior in EX vs. CON. 4. To compare the effect of EX vs. CON on selected patient-reported symptomatic adverse events in patients with CRLM undergoing surgery 5. To compare the effect of EX vs. CON on surgical stress responses (neuroendocrine, inflammatory, and immune factors) in patients with CRLM undergoing surgery.