Feasibility and Preliminary Efficacy of Heavy Lifting Strength Training Versus Usual Care in Head and Neck Cancer Survivors: A Randomized Controlled Trial

1. Background and Rationale

Despite improvements in treatments, head and neck cancer survivors (HNCS) still endure acute and chronic side effects such as loss of muscular strength, limitations in physical functioning, fatigue, and swallowing difficulties that impact quality of life (QoL) and limit return to work. Light-to-moderate intensity strength training (LMST) has been shown to improve some side effects. Heavy lifting strength training (HLST) may further improve outcomes in some populations, however, only one small pilot study has focused on HNCS. 2. Research Question & Objectives

The primary aim of the proposed study is to further establish the feasibility of HLST in HNCS which will be based on the eligibility rate, recruitment rate, one-repetition max (3RM) testing rate, HLST program adherence, and follow-up assessment rate. A secondary aim is to provide preliminary evidence of the effects of a HLST program compared to usual care (UC) in HNCS. The primary efficacy outcome will be upper and lower muscular strength assessed by reliable 3-repetition maximum (3RM) tests on the chest press and leg press machines. Secondary efficacy outcomes include physical function, handgrip strength, body composition, QoL, fear of cancer recurrence, symptom burden, pain, anxiety, fatigue, stress, self-esteem, shoulder mobility, sleep, malnutrition status, and swallowing abilities. 3. Methods

This single-centre, two-armed, randomized controlled trial will recruit 60 HNCS ≥1-year posttreatment, and randomly assign them to the HLST group or UC group. For the HLST group, the 12-week exercise intervention will include supervised training 2 days per week. The HLST group will progress to lifting low repetitions of heavy loads at 80-90% of one repetition maximum (1RM), whereas the UC group will not receive any exercise prescription or instruction during the 12-week intervention, but will be offered a 4-week introduction to HLST program and/or referred to a community-based program after the postintervention assessments are complete. Assessments for both groups will occur at baseline and postintervention and include reliable 3RM strength tests, bioelectrical impedance analysis (BIA), Senior's Fitness Test, and validated QoL questionnaires.