Running Slopes and Power Performance

Concurrent Effect of Running in Different Slopes on Power Performance

The objective of the present study was to determine the effect of interval session running at high intensity with 1% or 10% gradient on the height of the drop jump. The cinematic variables concentric phase, eccentric and contact time were compared after the running session in both conditions in order to explain possible changes in the jump performance. The investigators theorize that the lower eccentric overload in the running to 10% inclination promotes higher deleterious effect on power performance of the lower limbs

Study Overview

• Status: Completed
• Conditions: Healthy
• Intervention / Treatment: Other: Interval Training at 1% incline; Other: Interval Training at 10% incline

Detailed Description

Physical training programs are typically composed of activities directed to the development of different valences usually stimulated in the same session. When aerobic activities of long duration prior isokinetic strength exercises, isotonic, or explosive, deleterious effects seem to be induced on performance of these valences. These short and long-term changes in muscle strength and power would be directly associated with repetitive eccentric loads that characterize the endurance running. Gradual increases in the running slope were inversely associated with a proportional reduction in the eccentric loads, which in turn would result in less muscle damage to intra and extrafusal fibers. So, the change in the slope of the race would emerge as an optional way to neutralize the competitive effect on the power performance. The research consisted of five visits. At the initial visit was conducted familiarization to vertical drop jump, and immediately after, the determination of VO2max values and their associated speed (vVO2max). The second visit was a new familiarization for the vertical drop jump followed immediately determining the Time to exhaustion performance in vVO2max (100% of VO2Max). Two jumps were performed on each of the three selected heights (20, 30 and 40 cm) were used in the experimental sessions and control only the height associated with the highest performance. In subsequent visits (third to fifth), participants performed three maximum jumps before and about 10 min after the following conditions: high intensity Interval running a 10% gradient (C10%), 1% grade (C1%) and control condition (CON).

• Study Type: Interventional
• Enrollment (Actual): 25
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 45 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• age: 18 at 45 years
• no cardiovascular or metabolic problems
• minimum level of aerobic activity recommended by American College of Sports Medicine

Exclusion Criteria:

• no joint or muscle injuries
• no use ergogenic or anabolic resources

Study Plan

How is the study designed?

Design Details

• Allocation: Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Interval Training at 1% incline; Procedure: Initial Drop Jump (20;30;40 cm), Six Stimulus of High Intensity Interval Training at 1% incline, Final Drop Jump (20;30;40 cm)	Other: Interval Training at 1% incline; Six stimuli were performed to exhaustion. The vertical drop jump strategy (height and kinematics) served to establish the magnitude of the concurrent effect; Other Names: HIIT at 1%; High Intensity Interval Training at 1%
Experimental: Interval Training at 10% incline; Procedure: Initial Drop Jump (20;30;40 cm), Six Stimulus of High Intensity Interval Training at 10% incline, Final Drop Jump (20;30;40 cm)	Other: Interval Training at 10% incline; Six stimuli were performed to exhaustion. The vertical drop jump strategy (height and kinematics) served to establish the magnitude of the concurrent effect.; Other Names: HIIT at 10%; High Intensity Interval Training at 10%
No Intervention: Control; Procedure: Initial Drop Jump (20;30;40 cm), 20 min Rest, Final Drop Jump (20;30;40 cm)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Kinematic of Height Jump	the same group (N=25) of subjects performed the experimental procedure in the last three sessions aiming to achieve the highest performance in all three conditions	up to 1 month

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Kinematic of Concentric Phase	the same group of subjects performed the experimental procedure in the last three sessions	up to 1 month
Kinematic of Excentric Phase	the same group of subjects performed the experimental procedure in the last three sessions	up to 1 month
Kinematic of Contact Time	the same group of subjects performed the experimental procedure in the last three sessions	up to 1 month

Collaborators and Investigators

• Sponsor: Universidade Federal do Rio de Janeiro
• Investigators: Study Director: Tony Santos, Doctor, Universidade Federal de Pernambuco

Study record dates

Study Major Dates

• Study Start: March 1, 2012
• Primary Completion (Actual): August 1, 2012
• Study Completion (Actual): December 1, 2012

Study Registration Dates

• First Submitted: July 29, 2015
• First Submitted That Met QC Criteria: July 31, 2015
• First Posted (Estimate): August 3, 2015

Study Record Updates

• Last Update Posted (Estimate): August 3, 2015
• Last Update Submitted That Met QC Criteria: July 31, 2015
• Last Verified: July 1, 2015

More Information

Terms related to this study

• Keywords: High Intensity Interval Training; Muscle Fatigue; Drop Jump; Aerobic Performance
• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Micronutrients; Vitamins; Bone Density Conservation Agents; Dihydrotachysterol
• Other Study ID Numbers: UGF 02