MedTrace Logo

Effect of Instability on Power and Speed in Bench Press

NCT04771494 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2021-02-25

No results posted yet for this study

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

Interventions

OTHER

Power and execution speed as a function of instability experience

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.

Sponsors & Collaborators

  • Universidad Politecnica de Madrid

    lead OTHER

Principal Investigators

  • Moisés M Marquina Nieto · Univerdidad Politécnica de Madrid

Study Design

Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-09-01
Primary Completion
2020-02-28
Completion
2020-05-17

Countries

  • Spain

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04771494 on ClinicalTrials.gov