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Chest Press Variations and Pectoralis Major Mechanics
Sponsor: Nihat Sarıalioğlu
Summary
This randomized controlled study aims to compare the acute effects of bench press (BP) and machine chest press (MCP) exercises on the mechanical properties of the pectoralis major muscle in resistance-trained bodybuilders. Sixteen male athletes are randomly assigned to BP or MCP groups. Both groups perform four sets of ten repetitions at 80% of one-repetition maximum with equalized volume load. Muscle mechanical properties, including oscillation frequency, stiffness, decrement, relaxation time, and creep, are measured using MyotonPRO before and immediately after exercise. The study hypothesizes that BP will induce greater stiffness due to higher stabilization demands, whereas MCP will produce greater increases in oscillation frequency due to more isolated loading.
Official title: Bench Press and Machine Chest Press Elicit Distinct Acute Mechanical Responses in the Pectoralis Major: A Randomized Controlled Study
Key Details
Gender
MALE
Age Range
20 Years - 40 Years
Study Type
INTERVENTIONAL
Enrollment
16
Start Date
2025-01-01
Completion Date
2025-12-31
Last Updated
2026-04-20
Healthy Volunteers
Yes
Interventions
Bench Press Exercise
Participants performed a resistance training protocol consisting of four sets of ten repetitions at 80% of one-repetition maximum using barbell bench press, with 2-minute rest intervals between sets.
Machine Chest Press Exercise
Participants performed a resistance training protocol consisting of four sets of ten repetitions at 80% of one-repetition maximum using a machine chest press, with 2-minute rest intervals between sets.
Locations (1)
Giresun University - Sports Science Faculty
Giresun, Centre, Turkey (Türkiye)