None listed
Conditions
Brief summary
This study aims to evaluate the effects of multi-joint isometric resistance training at various joint angles on several aspects of muscular fitness, including strength (both isometric and dynamic), power, muscle endurance, muscle hypertrophy (both whole body and region-specific), and fatigue recovery. These outcomes will be compared to those of traditional resistance training (i.e., dynamic/isotonic), with careful attention to ensuring equal volume and intensity between the groups. The study will adopt a randomised controlled trial design, with eligible participants randomly assigned to either an isometric resistance training group or a traditional resistance training group. Participants will engage in 3 sets of 6 repetitions each for the chest press and leg press exercises. In the traditional resistance training group, sets will involve isotonic contractions (ISOT) with the full range of motion (ROM) at 80% of their one-repetition maximum (1RM). Conversely, the isometric resistance training group will perform isometric contractions (ISOM) at 80% of their maximal voluntary contraction (MVC), with each set executed at a different angle within the normal lifting range of motion (i.e., lower third, middle third, and upper third). It is anticipated that this research will provide insights into the longitudinal effects of isometric resistance training on muscle performance.
Interventions
Isometric Resistance Training Group:
Materials: Keiser pneumatic resistance machines (Keiser Sports Health Equipment, Inc., Fresno, CA 93706, USA).
Procedures: Participants will engage in multi-joint isometric resistance training exercises targeting the chest (i.e., chest press) and leg muscles (i.e., leg press).
Delivery: Conducted in a group setting at a designated fitness facility under the supervision of researchers.
Frequency and Duration: There will be three sessions per week for a tot
Isometric Resistance Training Group: Materials: Keiser pneumatic resistance machines (Keiser Sports Health Equipment, Inc., Fresno, CA 93706, USA). Procedures: Participants will engage in multi-joint isometric resistance training exercises targeting the chest (i.e., chest press) and leg muscles (i.e., leg press). Delivery: Conducted in a group setting at a designated fitness facility under the supervision of researchers. Frequency and Duration: There will be three sessions per week for a total of 12 weeks. Each session will include three sets of 6 repetitions each for the chest press and leg press exercises. Each session lasts approximately 60 minutes. Specifics: Isometric contractions will be performed at 80% of the participant's maximal voluntary contraction (MVC). Each participant's MVC will be determined before the beginning of the trial, reassessed midway through the study, and the training load adjusted accordingly. Each set will be executed at a different angle within the normal lifting range of motion (i.e., lower third, middle third, and upper third). Adherence/Fidelity: Adherence will be monitored through attendance records for each session. Fidelity will be ensured through standardized protocols and regular training sessions for the intervention providers. Location: The study will be conducted at the Susan Wakil Health Building level 5, the University of Sydney (Camperdown).
Sponsors
University of Sydney
Study design
Allocation
Randomised controlled trial
Primary purpose
Educational / counselling / training
Eligibility
Sex/Gender
Male
Age
18 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
1) male, 2) aged 18-45 years; 3) not engaged in structured resistance training, and 4) be apparently healthy.
Exclusion criteria
1) unstable medical conditions that would preclude exercising; 2) current musculoskeletal injuries, conditions, or limitations (e.g., muscle strain/pain and joint instability) of the upper or lower body; 3) current lower back pain; and 4) inguinal, femoral, or umbilical hernia.
Outcome results
None listed