Effects of an Acute and Chronic Training Protocol Associated to the Inter-set Velocity Loss

Alejandro Muñoz López

Status: Unknown

Conditions: Healthy

Treatments: Other: Familiarization; Other: Acute changes; Other: Chronic changes

Study type: Interventional

Funder types: Other

Identifiers

NCT03964519

TMG_velocity_lost

Details and patient eligibility

About

This study evaluates different performance, physiological and neuromuscular changes after acute and chronic resistance training intervention in physically active men. The participants will train with a single exercise (full squat) and will be monitored with a linear encoder. The experiment will consist of between 3 to 6 sets between 70% to 85% of 1RM in the full squat exercise. Two main groups will form the intervention: one group will perform inter-set repetitions until there will be a 20% of velocity loss compared to the first repetition, while the second group will have a 40% of velocity loss.

Full description

The main dependent variables and instruments will be:

1. Tensyomiography: neuromuscular properties of the vastus lateral (VL), rectus femoris (RF) and vastus medialis (VM) from the dominant leg.
2. Force platform: kinetic variables in relation to a countermovement jump.
3. Near-infrared spectrography: oxygen saturation in the VL and VM.
4. Termographic camera: low limbs temperatura.
5. Linear encoder: mean propulsive velocity from each repetition
6. Electromyography: amplitude and frequency parameters related to a knee extension maximum voluntary contraction test.
7. Strain gauge: maximum isometric force.

Enrollment: 30 estimated patients

Sex: Male

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• To be healthy
• Without injuries or actual illnesses
• More than 2 years of experience in resistance training or federative sports

Exclusion criteria

• To be sick or injured
• To have programmed during the intervention phase a dramatic change in the lifestyle

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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30 participants in 3 patient groups, including a placebo group

20% velocity loss

Experimental group

Description:

This group will train with a variable number of repetitions during each set. The group will stop the set once the mean propulsive velocity will be 20% less compared to the first repetition.

Treatment:

Other: Acute changes

Other: Chronic changes

Other: Familiarization

40% velocity loss

Experimental group

Description:

This group will train with a variable number of repetitions during each set. The group will stop the set once the mean propulsive velocity will be 40% less compared to the first repetition.

Treatment:

Other: Acute changes

Other: Chronic changes

Other: Familiarization

Control group

Placebo Comparator group

Description:

This group will be just tested as a control group.

Treatment:

Other: Chronic changes

Other: Familiarization