None listed
Conditions
Brief summary
The objective of this study was to analyse the effect of different training volumes and training intensities in the flywheel half squat exercise. It will be executed by healthy active subjects, both men and women, over 18 years old. Subjects will execute the flywheel half squat exercise twice a week, with different combinations of velocity losses (volume) and moments of inertia (intensity). We will test peak isometric force, maximum rate of force development, and jump height.
Interventions
Randomised flywheel half-squat exercise, with different combinations of three velocity losses thresholds (5%, 10% and 15%) and three external loads or moments of inertia (0.05 kg·m2, 0.10 kg·m2, and 0.15 kg·m2). More specifically, the combinations will be:
1. Combination 1: Velocity Loss 5%, 0.05 kg·m2 moment of inertia
2. Combination 2: Velocity Loss 5%, 0.10 kg·m2 moment of inertia
3. Combination 3: Velocity Loss 5%, 0.15 kg·m2 moment of inertia
4. Combination 4: Velocity Loss 10%, 0.05 kg·m2
Randomised flywheel half-squat exercise, with different combinations of three velocity losses thresholds (5%, 10% and 15%) and three external loads or moments of inertia (0.05 kg·m2, 0.10 kg·m2, and 0.15 kg·m2). More specifically, the combinations will be: 1. Combination 1: Velocity Loss 5%, 0.05 kg·m2 moment of inertia 2. Combination 2: Velocity Loss 5%, 0.10 kg·m2 moment of inertia 3. Combination 3: Velocity Loss 5%, 0.15 kg·m2 moment of inertia 4. Combination 4: Velocity Loss 10%, 0.05 kg·m2 moment of inertia 5. Combination 5: Velocity Loss 10%, 0.10 kg·m2 moment of inertia 6. Combination 6: Velocity Loss 10%, 0.15 kg·m2 moment of inertia 7. Combination 7: Velocity Loss 15%, 0.05 kg·m2 moment of inertia 8. Combination 8: Velocity Loss 15%, 0.10 kg·m2 moment of inertia 9. Combination 9: Velocity Loss 15%, 0.15 kg·m2 moment of inertia Each participant will execute three combinations on a single session, repeated twice a week, with 48-72h interspersed (wash-out period). Each session will last about 60 min per participant, and the total intervention duration will be five weeks. Each session will be attended by pairs. The flywheel device will be a cylindrical shaft FRTD (Kbox 3, Exxentrix, Sweeden), with a load range ranging from 0.005 to 0.300 kg·m2 and an axis radius width of 0.025 m, monitored with a rotary encoder (SmartCoach Lite, SmartCoach Tech, USA). The main intervention will be supervised by a sport scientist with expertise in the execution of resistance training with flywheel devices.
Sponsors
Universidad de Sevilla
Study design
Allocation
Randomised controlled trial
Intervention model
Crossover
Primary purpose
Treatment
Masking
Open (masking not used)
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Participants will be required to be at least 18 years old and to have been participating regularly in physical activities that engage the muscles of the lower limbs for a minimum of the last six months. The participants will have previous experience in performing the main exercise (a minimum of three months, twice a week).
Exclusion criteria
Individuals who have medical conditions that prevent them from participating in vigorous and intense physical exercises or who have any form of injury, disease, or pathology will not be included in the study.
Outcome results
None listed