Effects of different training methods on the triceps muscles on lower leg muscle pump function.

UMIN ID: UMIN000052103

Registered date:05/09/2023

Basic Information

• Recruitment status: Pending
• Health condition(s) or Problem(s) studied: young healthy adults
• Date of first enrollment: 2023/09/01
• Target sample size: 30
• Countries of recruitment: Japan
• Study type: Interventional

Intervention(s)

Maximal load group: One-leg standing posture, weight-bearing, one-leg standing posture with the front of the foot on a 5-cm platform and the upper limb resting on a wall or other support to maintain balance. 1 sec for raising, 3 sec for lowering, and the maximum number of times measured prior to the intervention. After a break, the opposite side is also performed. This exercise is performed 3 days a week for 8 weeks.
Moderate load group: One-leg standing posture, weight-bearing, one-leg standing posture on a 5-cm platform with the front of the foot grounded and the upper limb resting on a wall or other support to maintain balance. 1 second to raise, 3 seconds to lower, 60% of the maximum number of repetitions measured before the intervention. After a break, the opposite side is performed. This exercise is performed 3 days a week for 8 weeks.

Outcome(s)

• Primary Outcome: LgEF (lower leg ejection fraction) Measure using an air plethysmograph (APG-1000). At first, the subject's leg is elevated about 45 to empty venous blood in the lower leg. Then, the subject is placed in a standing position, and venous capacity is measured by arterial inflow and venous regurgitation at rest, and the venous filling index is calculated. Next, LgEF is evaluated by performing a single toe-up exercise and measuring ejection fraction. The evaluation periods will be pre-intervention, mid-intervention (week 4), and 8 weeks post-intervention.
• Secondary Outcome: 1. Ankle joint plantar flexion maximum torque Ankle plantar flexion muscle force (Nm) and ankle plantar flexion muscle force/body weight ratio (%) by isometric contraction of the triceps femoris muscle are measured using a multi-purpose muscle function evaluation exercise device (BIODEX System 4). 2. Lower limb skeletal muscle mass Measurements will be taken using a high-precision body component analyzer (Inbody). Subjects will be barefoot and will assume a static standing position on the device for about 1 minute. The bioelectrical impedance method measures the skeletal muscle mass of the left and right limbs and trunk, and the lower limb muscle mass is employed in the measurement. 3. Lower leg circumference The Calf Ankle Index, which is considered to be an indicator of general condition and is not influenced by individual differences, is measured. 4. Lower leg capacity Lower leg volume is measured using the water displacement method, one of the quantitative assessments of volumetric measurements. The subject immerses the lower leg in a tank full of water. The volume of the overflowing water is used to measure the leg volume. All secondary outcomes will be assessed at the same time as the primary outcome.

Key inclusion & exclusion criteria

• Age minimum: 18years-old
• Age maximum: 30years-old
• Gender: Male
• Exclude criteria: Exclude those who routinely perform resistance training, those with ankle joint movement disorders, and those with cardiovascular disease, including venous disease.

Related Information

• Primary Sponsor: International University of Health and Welfare
• Source(s) of Monetary Support: No research funding