Effect of Instability on Power and Speed in Bench Press

NCT04771494 | Completed DMC

• 1 other identifier: Power and speed in instability
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of this study was to analyse and compare the speed and power parameters in bench press training in different degrees of instability: 1) stable (PBE), 2) with asymmetric load (PBA), 3) with oscillating load (PBO), 4) on fitball (PBF) and 5) on bosu (PBB). For this purpose, 20 male subjects (10 trained and 10 untrained) with specific experience in training under unstable conditions were evaluated with respect to mean propulsive velocity (MPV), maximum velocity (MV) and power (POT) with different types of external load: low load (40% of 1RM), medium load (60% of 1RM) and high load (80% of 1RM) in each condition.

Conditions

Instability, Joint

Keywords

Strength Training; Unstable Devices; Balance; Speed Training; Core

Outcome Measures

Primary Outcomes (3)

• Power

  the ability to perform different actions, developing maximum strength in a short time

  1 month

• Maximum Speed

  maximum value of m/s reached during the exercise

  1 month

• Mean Propulsive Speed

  the average speed reached during the concentric phase of the exercise is recorded

  1 month

Study Arms (2)

Trained

EXPERIMENTAL

Participants with at least 6 months of training with unstable devices

Other: Power and execution speed as a function of instability experience

Untrained

EXPERIMENTAL

Participants with no previous instability experience

Other: Power and execution speed as a function of instability experience

Interventions

Power and execution speed as a function of instability experience OTHER

Each subject performed 3 repetitions for the light load (40% RM; VMP \> 1.0 m/s), with 1 minute rest; 2 repetitions for the medium load (60% RM; 0.65 m/s ≤ VMP ≤ 1.0 m/s) with 2 minutes rest and 1 repetition for the heavy load (80% RM; VMP \< 0.65 m/s) with 4 minutes rest. A metronome was used for the start countdown and to time the eccentric and concentric portions of the exercise. Subjects began the bench press with their elbows fully extended, maintaining a grip distance slightly greater than shoulder width. The bar was then lowered to their chest and then applying as much thrust as possible until full elbow extension on a 2-1-0 count. The timing sequence involved 2 seconds for the eccentric phase, a 1 second hold (to minimise the contribution of the rebound effect and allow for more reproducible and consistent measurements) and for the concentric "up" phase the highest possible execution speed, until the bar returned to the starting position.

Trained; Untrained

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• two years of continuous strength training experience
• a minimum of 6 months of suspended training experience

You may not qualify if:

• Athletes who presented pain or skeletal or neuromuscular disorder

Sponsors & Collaborators

• Universidad Politecnica de Madrid: lead

Study Sites (1)

Facultad Ciencias de la Actividad Física y del Deporte

Madrid, 28040, Spain

Location

MeSH Terms

Conditions

Joint Instability

Condition Hierarchy (Ancestors)

Joint Diseases; Musculoskeletal Diseases

Study Officials

• Moisés M Marquina Nieto

  Univerdidad Politécnica de Madrid

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: February 22, 2021
• First Posted: February 25, 2021
• Study Start: September 1, 2019
• Primary Completion: February 28, 2020
• Study Completion: May 17, 2020
• Last Updated: February 25, 2021

Record last verified: 2021-02

Data Sharing

• IPD Sharing: Will not share

Locations

ES (1)